# CVE-2023-22899: zip4j: Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP arch...

CVE-2023-22899 is fixed in zip4j on 1 platform, first by DEBIAN-CVE-2023-22899, released January 10, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-22899
- Priority: Routine
- CVSS: 5.9 (medium)
- EPSS: 0.0064
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 10, 2023

## Description

Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | zip4j Debian 12.15 (bookworm) | 2.11.2-3 | [DEBIAN-CVE-2023-22899](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22899.md) | Jan 10, 2023 |
| Linux | zip4j Debian 13.5 (trixie) | 2.11.2-3 | [DEBIAN-CVE-2023-22899](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22899.md) | Jan 10, 2023 |
| Linux | zip4j Debian 14 | 2.11.2-3 | [DEBIAN-CVE-2023-22899](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22899.md) | Jan 10, 2023 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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