What’s Vulnerable › Vulnerabilities
CVE-2023-22899
- Severity: medium (CVSS 5.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2023-01-10 · updated 2026-06-17
- Weakness: CWE-346
Description
Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.
Affected products
- zip4j: through 2.11.2
References
- https://breakingthe3ma.app
- https://breakingthe3ma.app/files/Threema-PST22.pdf
- https://github.com/srikanth-lingala/zip4j/issues/485
- https://github.com/srikanth-lingala/zip4j/releases
- https://news.ycombinator.com/item?id=34316206
- https://threema.ch/en/blog/posts/news-alleged-weaknesses-statement
- https://breakingthe3ma.app
- https://breakingthe3ma.app/files/Threema-PST22.pdf
- https://github.com/srikanth-lingala/zip4j/issues/485
- https://github.com/srikanth-lingala/zip4j/releases
- https://news.ycombinator.com/item?id=34316206
- https://threema.ch/en/blog/posts/news-alleged-weaknesses-statement
Get alerted when CVE-2023-22899 or the next vulnerability affects your stack