CVE-2021-33391
tidy: An issue in HTACG HTML Tidy v5.7.28 allows attacker to execute arbitrarycode via the -g option of the CleanNode() fun...
CVE-2021-33391 is fixed in 4 products on 1 platform, first by libtidy5deb1 2:5.6.0-11ubuntu0.20.04.1, released February 17, 2023. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
9.8
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0113
66th percentile
An issue in HTACG HTML Tidy v5.7.28 allows attacker to execute arbitrarycode via the -g option of the CleanNode() function in gdoc.c.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libtidy58 · Ubuntu 25.04 (plucky) | 2:5.6.0-11ubuntu1 | libtidy58 2:5.6.0-11ubuntu1 | Jan 16, 2026 |
| libtidy5deb1 · Ubuntu 20.04 LTS (focal) | 2:5.6.0-11ubuntu0.20.04.1 | libtidy5deb1 2:5.6.0-11ubuntu0.20.04.1 | Feb 17, 2023 |
| libtidy5deb1 · Ubuntu 22.04.1 LTS (jammy) | 2:5.6.0-11ubuntu0.22.04.1 | libtidy5deb1 2:5.6.0-11ubuntu0.22.04.1 | Feb 17, 2023 |
| libtidy5deb1 · Ubuntu 24.04.5 LTS (noble) | 2:5.6.0-11ubuntu1 | libtidy5deb1 2:5.6.0-11ubuntu1 | Feb 17, 2023 |
| libtidy5deb1 · Ubuntu 24.10 (oracular) | 2:5.6.0-11ubuntu1 | libtidy5deb1 2:5.6.0-11ubuntu1 | Jan 16, 2026 |
| tidy · Ubuntu 20.04 LTS (focal) | 2:5.6.0-11ubuntu0.20.04.1 | tidy 2:5.6.0-11ubuntu0.20.04.1 | Feb 17, 2023 |
| tidy · Ubuntu 22.04.1 LTS (jammy) | 2:5.6.0-11ubuntu0.22.04.1 | tidy 2:5.6.0-11ubuntu0.22.04.1 | Feb 17, 2023 |
| tidy · Ubuntu 24.04.5 LTS (noble) | 2:5.6.0-11ubuntu1 | tidy 2:5.6.0-11ubuntu1 | Feb 17, 2023 |
| tidy · Ubuntu 24.10 (oracular) | 2:5.6.0-11ubuntu1 | tidy 2:5.6.0-11ubuntu1 | Jan 16, 2026 |
| tidy · Ubuntu 25.04 (plucky) | 2:5.6.0-11ubuntu1 | tidy 2:5.6.0-11ubuntu1 | Jan 16, 2026 |
| tidy-html5 · Debian 13.5 (trixie) | 2:5.8.0-2 | DEBIAN-CVE-2021-33391 | Feb 17, 2023 |
| tidy-html5 · Debian 14 | 2:5.8.0-2 | DEBIAN-CVE-2021-33391 | Feb 17, 2023 |
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