CVE-2023-50094 — reNgine before 2

reNgine before 2.1.2 allows OS Command Injection if an adversary has a valid session ID. The attack places shell metacharacters in an api/tools/waf_detector/?url= string. The commands are executed as root via subprocess.check_output.

01What is this vulnerability?

reNgine before 2.1.2 allows OS Command Injection if an adversary has a valid session ID. The attack places shell metacharacters in an api/tools/waf_detector/?url= string. The commands are executed as root via subprocess.check_output.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-01-01T00:00:00.000Z
• Last modified: 2025-04-17T18:55:32.440Z

09References

• github.com — https://github.com/yogeshojha/rengine/blob/5e120bd5f9dfbd1da82a193e8c9702e483d38…
• github.com — https://github.com/yogeshojha/rengine/security
• github.com — https://github.com/yogeshojha/rengine/releases
• www.mattz.io — https://www.mattz.io/posts/cve-2023-50094/
• github.com — https://github.com/yogeshojha/rengine/security/advisories/GHSA-fx7f-f735-vgh4
• github.com — https://github.com/yogeshojha/rengine/commit/3d5f1724dd12cf9861443742e7d7c02ff8c…
• github.com — https://github.com/yogeshojha/rengine/commit/edd3c85ee16f93804ad38dac5602549d2d3…
• github.com — https://github.com/yogeshojha/rengine/blob/53d9f505f04861a5040195ea71f20907ff905…