CVE-2025-3522

Leak of hashed Window credentials via crafted attachment URL

CVE-2025-3522 is fixed in 139 products on 2 platforms, first by Mozilla Thunderbird (af) 137.0.2, released April 15, 2025. It is not reported as exploited. Patch Radar priority: High.

HighFixed on 2 platforms
CVSS
7.4
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0027
19th percentile

Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validated or sanitized, it can reference internal resources like chrome:// or SMB share file:// links, potentially leading to hashed Windows credential leakage and opening the door to more serious security issues. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.

Where it's fixed

ProductFixed inFixReleased
Windows apps
Mozilla Thunderbird (af) 137.0.2 Mozilla Thunderbird (af) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ar) 137.0.2 Mozilla Thunderbird (ar) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ast) 137.0.2 Mozilla Thunderbird (ast) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (be) 137.0.2 Mozilla Thunderbird (be) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (bg) 137.0.2 Mozilla Thunderbird (bg) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (br) 137.0.2 Mozilla Thunderbird (br) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ca) 137.0.2 Mozilla Thunderbird (ca) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (cak) 137.0.2 Mozilla Thunderbird (cak) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (cs) 137.0.2 Mozilla Thunderbird (cs) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (cy) 137.0.2 Mozilla Thunderbird (cy) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (da) 137.0.2 Mozilla Thunderbird (da) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (de) 137.0.2 Mozilla Thunderbird (de) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (dsb) 137.0.2 Mozilla Thunderbird (dsb) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (el) 137.0.2 Mozilla Thunderbird (el) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (en-CA) 137.0.2 Mozilla Thunderbird (en-CA) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (en-GB) 137.0.2 Mozilla Thunderbird (en-GB) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (en-US) 137.0.2 Mozilla Thunderbird (en-US) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (es-AR) 137.0.2 Mozilla Thunderbird (es-AR) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (es-ES) 137.0.2 Mozilla Thunderbird (es-ES) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (es-MX) 137.0.2 Mozilla Thunderbird (es-MX) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (et) 137.0.2 Mozilla Thunderbird (et) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (eu) 137.0.2 Mozilla Thunderbird (eu) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (fi) 137.0.2 Mozilla Thunderbird (fi) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (fr) 137.0.2 Mozilla Thunderbird (fr) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (fy-NL) 137.0.2 Mozilla Thunderbird (fy-NL) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ga-IE) 137.0.2 Mozilla Thunderbird (ga-IE) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (gd) 137.0.2 Mozilla Thunderbird (gd) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (gl) 137.0.2 Mozilla Thunderbird (gl) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (he) 137.0.2 Mozilla Thunderbird (he) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (hr) 137.0.2 Mozilla Thunderbird (hr) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (hsb) 137.0.2 Mozilla Thunderbird (hsb) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (hu) 137.0.2 Mozilla Thunderbird (hu) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (hy-AM) 137.0.2 Mozilla Thunderbird (hy-AM) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (id) 137.0.2 Mozilla Thunderbird (id) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (is) 137.0.2 Mozilla Thunderbird (is) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (it) 137.0.2 Mozilla Thunderbird (it) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ja) 137.0.2 Mozilla Thunderbird (ja) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ka) 137.0.2 Mozilla Thunderbird (ka) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (kab) 137.0.2 Mozilla Thunderbird (kab) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (kk) 137.0.2 Mozilla Thunderbird (kk) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ko) 137.0.2 Mozilla Thunderbird (ko) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (lt) 137.0.2 Mozilla Thunderbird (lt) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (lv) 137.0.2 Mozilla Thunderbird (lv) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ms) 137.0.2 Mozilla Thunderbird (ms) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (nb-NO) 137.0.2 Mozilla Thunderbird (nb-NO) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (nl) 137.0.2 Mozilla Thunderbird (nl) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (nn-NO) 137.0.2 Mozilla Thunderbird (nn-NO) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (pa-IN) 137.0.2 Mozilla Thunderbird (pa-IN) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (pl) 137.0.2 Mozilla Thunderbird (pl) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (pt-BR) 137.0.2 Mozilla Thunderbird (pt-BR) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (pt-PT) 137.0.2 Mozilla Thunderbird (pt-PT) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (rm) 137.0.2 Mozilla Thunderbird (rm) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ro) 137.0.2 Mozilla Thunderbird (ro) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (ru) 137.0.2 Mozilla Thunderbird (ru) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (sk) 137.0.2 Mozilla Thunderbird (sk) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (sl) 137.0.2 Mozilla Thunderbird (sl) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (sq) 137.0.2 Mozilla Thunderbird (sq) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (sr) 137.0.2 Mozilla Thunderbird (sr) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (sv-SE) 137.0.2 Mozilla Thunderbird (sv-SE) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (th) 137.0.2 Mozilla Thunderbird (th) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (tr) 137.0.2 Mozilla Thunderbird (tr) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (uk) 137.0.2 Mozilla Thunderbird (uk) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (uz) 137.0.2 Mozilla Thunderbird (uz) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (vi) 137.0.2 Mozilla Thunderbird (vi) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (zh-CN) 137.0.2 Mozilla Thunderbird (zh-CN) 137.0.2 Apr 15, 2025
Mozilla Thunderbird (zh-TW) 137.0.2 Mozilla Thunderbird (zh-TW) 137.0.2 Apr 15, 2025
Mozilla Thunderbird ESR (af) 128.9.2 Mozilla Thunderbird ESR (af) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ar) 128.9.2 Mozilla Thunderbird ESR (ar) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ast) 128.9.2 Mozilla Thunderbird ESR (ast) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (be) 128.9.2 Mozilla Thunderbird ESR (be) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (bg) 128.9.2 Mozilla Thunderbird ESR (bg) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (br) 128.9.2 Mozilla Thunderbird ESR (br) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ca) 128.9.2 Mozilla Thunderbird ESR (ca) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (cak) 128.9.2 Mozilla Thunderbird ESR (cak) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (cs) 128.9.2 Mozilla Thunderbird ESR (cs) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (cy) 128.9.2 Mozilla Thunderbird ESR (cy) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (da) 128.9.2 Mozilla Thunderbird ESR (da) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (de) 128.9.2 Mozilla Thunderbird ESR (de) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (dsb) 128.9.2 Mozilla Thunderbird ESR (dsb) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (el) 128.9.2 Mozilla Thunderbird ESR (el) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (en-CA) 128.9.2 Mozilla Thunderbird ESR (en-CA) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (en-GB) 128.9.2 Mozilla Thunderbird ESR (en-GB) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (en-US) 128.9.2 Mozilla Thunderbird ESR (en-US) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (es-AR) 128.9.2 Mozilla Thunderbird ESR (es-AR) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (es-ES) 128.9.2 Mozilla Thunderbird ESR (es-ES) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (es-MX) 128.9.2 Mozilla Thunderbird ESR (es-MX) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (et) 128.9.2 Mozilla Thunderbird ESR (et) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (eu) 128.9.2 Mozilla Thunderbird ESR (eu) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (fi) 128.9.2 Mozilla Thunderbird ESR (fi) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (fr) 128.9.2 Mozilla Thunderbird ESR (fr) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (fy-NL) 128.9.2 Mozilla Thunderbird ESR (fy-NL) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ga-IE) 128.9.2 Mozilla Thunderbird ESR (ga-IE) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (gd) 128.9.2 Mozilla Thunderbird ESR (gd) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (gl) 128.9.2 Mozilla Thunderbird ESR (gl) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (he) 128.9.2 Mozilla Thunderbird ESR (he) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (hr) 128.9.2 Mozilla Thunderbird ESR (hr) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (hsb) 128.9.2 Mozilla Thunderbird ESR (hsb) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (hu) 128.9.2 Mozilla Thunderbird ESR (hu) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (hy-AM) 128.9.2 Mozilla Thunderbird ESR (hy-AM) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (id) 128.9.2 Mozilla Thunderbird ESR (id) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (is) 128.9.2 Mozilla Thunderbird ESR (is) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (it) 128.9.2 Mozilla Thunderbird ESR (it) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ja) 128.9.2 Mozilla Thunderbird ESR (ja) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ka) 128.9.2 Mozilla Thunderbird ESR (ka) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (kab) 128.9.2 Mozilla Thunderbird ESR (kab) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (kk) 128.9.2 Mozilla Thunderbird ESR (kk) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ko) 128.9.2 Mozilla Thunderbird ESR (ko) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (lt) 128.9.2 Mozilla Thunderbird ESR (lt) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (lv) 128.9.2 Mozilla Thunderbird ESR (lv) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ms) 128.9.2 Mozilla Thunderbird ESR (ms) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (nb-NO) 128.9.2 Mozilla Thunderbird ESR (nb-NO) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (nl) 128.9.2 Mozilla Thunderbird ESR (nl) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (nn-NO) 128.9.2 Mozilla Thunderbird ESR (nn-NO) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (pa-IN) 128.9.2 Mozilla Thunderbird ESR (pa-IN) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (pl) 128.9.2 Mozilla Thunderbird ESR (pl) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (pt-BR) 128.9.2 Mozilla Thunderbird ESR (pt-BR) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (pt-PT) 128.9.2 Mozilla Thunderbird ESR (pt-PT) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (rm) 128.9.2 Mozilla Thunderbird ESR (rm) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ro) 128.9.2 Mozilla Thunderbird ESR (ro) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (ru) 128.9.2 Mozilla Thunderbird ESR (ru) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (sk) 128.9.2 Mozilla Thunderbird ESR (sk) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (sl) 128.9.2 Mozilla Thunderbird ESR (sl) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (sq) 128.9.2 Mozilla Thunderbird ESR (sq) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (sr) 128.9.2 Mozilla Thunderbird ESR (sr) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (sv-SE) 128.9.2 Mozilla Thunderbird ESR (sv-SE) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (th) 128.9.2 Mozilla Thunderbird ESR (th) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (tr) 128.9.2 Mozilla Thunderbird ESR (tr) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (uk) 128.9.2 Mozilla Thunderbird ESR (uk) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (uz) 128.9.2 Mozilla Thunderbird ESR (uz) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (vi) 128.9.2 Mozilla Thunderbird ESR (vi) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (zh-CN) 128.9.2 Mozilla Thunderbird ESR (zh-CN) 128.9.2 Apr 15, 2025
Mozilla Thunderbird ESR (zh-TW) 128.9.2 Mozilla Thunderbird ESR (zh-TW) 128.9.2 Apr 15, 2025
Linux
MozillaThunderbird · opensuse-leap 15.6 128.9.2-150200.8.209.1 SUSE-SU-2025:1366-1 Apr 24, 2025
MozillaThunderbird · sles 15.6 128.9.2-150200.8.209.1 SUSE-SU-2025:1366-1 Apr 24, 2025
thunderbird · Debian 12.15 (bookworm) 1:128.10.0esr-1~deb12u1 DEBIAN-CVE-2025-3522 Apr 15, 2025
thunderbird · Debian 13.5 (trixie) 1:128.10.0esr-1 DEBIAN-CVE-2025-3522 Apr 15, 2025
thunderbird · Debian 14 1:128.10.0esr-1 DEBIAN-CVE-2025-3522 Apr 15, 2025
thunderbird · RHEL 10 128.10.0-1.el10_0 RHSA-2025:7507 Apr 29, 2025
thunderbird · RHEL 8 0:128.9.2-1.el8_10 RHSA-2025:4649 May 7, 2025
thunderbird · RHEL 9 0:128.10.0-1.el9_6 RHSA-2025:7435 May 13, 2025
thunderbird · Ubuntu 22.04.1 LTS (jammy) 1:128.12.0+build1-0ubuntu0.22.04.1 thunderbird 1:128.12.0+build1-0ubuntu0.22.04.1 Jun 24, 2025
thunderbird · almalinux 10 128.10.0-1.el10_0.alma.1 ALSA-2025:7507 May 13, 2025
thunderbird · almalinux 8 128.9.2-1.el8_10.alma.1 ALSA-2025:4649 May 7, 2025
thunderbird · almalinux 9 128.10.0-1.el9_6.alma.1 ALSA-2025:7435 May 13, 2025
thunderbird · ol 10 0:128.11.0-1.0.1.el10_0 ELSA-2025-7507 Jun 30, 2025
thunderbird · ol 8 0:128.9.2-1.0.1.el8_10 ELSA-2025-4649 May 7, 2025
thunderbird · ol 9 0:128.9.2-1.0.1.el9_5 ELSA-2025-4229 Apr 28, 2025
thunderbird · rocky 9 0:128.10.0-1.el9_5 RLSA-2025:7435 Jul 29, 2025
thunderbird-gnome-support · Ubuntu 22.04.1 LTS (jammy) 1:128.12.0+build1-0ubuntu0.22.04.1 thunderbird-gnome-support 1:128.12.0+build1-0ubuntu0.22.04.1 Jun 24, 2025
thunderbird-mozsymbols · Ubuntu 22.04.1 LTS (jammy) 1:128.12.0+build1-0ubuntu0.22.04.1 thunderbird-mozsymbols 1:128.12.0+build1-0ubuntu0.22.04.1 Jun 24, 2025
xul-ext-calendar-timezones · Ubuntu 22.04.1 LTS (jammy) 1:128.12.0+build1-0ubuntu0.22.04.1 xul-ext-calendar-timezones 1:128.12.0+build1-0ubuntu0.22.04.1 Jun 24, 2025
xul-ext-gdata-provider · Ubuntu 22.04.1 LTS (jammy) 1:128.12.0+build1-0ubuntu0.22.04.1 xul-ext-gdata-provider 1:128.12.0+build1-0ubuntu0.22.04.1 Jun 24, 2025
xul-ext-lightning · Ubuntu 22.04.1 LTS (jammy) 1:128.12.0+build1-0ubuntu0.22.04.1 xul-ext-lightning 1:128.12.0+build1-0ubuntu0.22.04.1 Jun 24, 2025

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