CVE-2026-111687
WeRSS (we-mp-rss) through 1.5.3 RCE via template Parameter in /rss Endpoint
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-95 |
| Vendor | rachelos |
| Product | we-mp-rss |
| Published | Oct 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
rachelos / we-mp-rss
0 ≤ 1.5.3
References
hackmd.io: https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce github.com: https://github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166 github.com: https://github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198 vulncheck.com: https://www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint
Credits
hieuPenguinnn