CVE-2023-22899

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.64% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 50.6% of scored records. A rank, not a probability.

NVD base score

5.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-01-10 00:00Z3 YR AGO

Last updated

2025-04-09 15:31Z1 YR AGO

Reserved

2023-01-10

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses

• CWE-346Origin Validation ErrorClass

Data version

5.1

Document digest

5b63ae95e50d456c9d018ea0ecf558fa12f6b619cadf5833873edae55a2a03b3

• breakingthe3ma.apphttps://breakingthe3ma.app
• breakingthe3ma.apphttps://breakingthe3ma.app/files/Threema-PST22.pdf
• news.ycombinator.comhttps://news.ycombinator.com/item?id=34316206
• threema.chhttps://threema.ch/en/blog/posts/news-alleged-weaknesses-statement
• github.comhttps://github.com/srikanth-lingala/zip4j/releases
• github.comhttps://github.com/srikanth-lingala/zip4j/issues/485