RCE in Mybb
CVE-2023-41362
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.021 (80.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.021 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- mybb.com/versions/1.8.36/ (Release Notes)
- github.com/mybb/mybb/security/advisories/GHSA-pr74-wvp3-q6f5 (Patch, Third Party Advisory)
- github.com/mybb/mybb/commit/a43a6f22944e769a6eabc58c39e7bc18c1cab4ca.patch (Patch)
- blog.sorcery.ie/posts/mybb_acp_rce/
Frequently asked questions
- What is CVE-2023-41362?
- CVE-2023-41362 is a high-severity vulnerability in Mybb, classified under Code Injection. CVSS score: 7.2/10. Published 2023-08-29.
- How severe is CVE-2023-41362?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2023-41362 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.