CVE-2023-41362

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-29 · updated 2026-06-17
Weakness: CWE-94

Description

MyBB before 1.8.36 allows Code Injection by users with certain high privileges. Templates in Admin CP intentionally use eval, and there was some validation of the input to eval, but type juggling interfered with this when using PCRE within PHP.

Affected products

mybb: before 1.8.36 — fixed in 1.8.36

How to fix

Upgrade to a fixed version: mybb 1.8.36. Check the vendor advisory for mitigations.

References

https://blog.sorcery.ie/posts/mybb_acp_rce/
https://github.com/mybb/mybb/commit/a43a6f22944e769a6eabc58c39e7bc18c1cab4ca.patch
https://github.com/mybb/mybb/security/advisories/GHSA-pr74-wvp3-q6f5
https://mybb.com/versions/1.8.36/
https://blog.sorcery.ie/posts/mybb_acp_rce/
https://github.com/mybb/mybb/commit/a43a6f22944e769a6eabc58c39e7bc18c1cab4ca.patch
https://github.com/mybb/mybb/security/advisories/GHSA-pr74-wvp3-q6f5
https://mybb.com/versions/1.8.36/

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