CVE-2026-111687
critical · 9.3WeRSS (we-mp-rss) through 1.5.3 contains a remote code execution vulnerability that allows unauthenticated attackers to run code via the template parameter of the public GET /rss/{feed_id} endpoint. Attackers can supply a non-built-in ext value and a {{=expression}} template whose object-subclass traversal bypasses the eval denylist to run OS commands as the service account.
9.3
CVSS
1.0%
EPSS (exploit prob.)
63rd
EPSS percentile
2026-10-16
Published
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-95
References
- https://github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198
- https://github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166
- https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce
- https://www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint
- https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-111687