Description
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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-111687 ↗
- github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py ↗
- github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py ↗
- hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce ↗
- www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.