CVE-2026-111687
criticalWeRSS (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…
WeRSS (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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198 disclosure@vulncheck.com
- https://github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166 disclosure@vulncheck.com
- https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parame... disclosure@vulncheck.com
- https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce 134c704f-9b21-4f2e-91b3-4a467353bcc0