CVE-2023-22899
CVE-2023-22899 is a medium-severity vulnerability in Zip4j Project Zip4j with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.
Key facts
- Severity: Medium (CVSS 3.x base score 5.9)
- EPSS exploit prediction: 1% (45th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-346
- Affected product: Zip4j Project Zip4j
- Published:
- Last modified:
Description
Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.
Frequently asked questions
- What is CVE-2023-22899?
- Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.
- How severe is CVE-2023-22899?
- CVE-2023-22899 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2023-22899 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-22899?
- CVE-2023-22899 affects Zip4j Project Zip4j. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-22899?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2023-22899 published?
- CVE-2023-22899 was published on 2023-01-10 and last updated on 2026-06-17.
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
Affected products (1)
- cpe:2.3:a:zip4j_project:zip4j:*:*:*:*:*:*:*:*
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