CVE-2026-111687CWE-95

CVE-2026-111687

Critical · published October 16, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
62.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · 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
EPSS
0.01003 · 62.6th percentile
Weakness
CWE-95 · Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Published
2026-10-16T22:17Z
References (5)
https://github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198 · [email protected]https://github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166 · [email protected]https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce · [email protected]https://www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint · [email protected]https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 1%
    epss
  • 16 OCT 17:39Z
    WeRSS (we-mp-rss) through 1.5.3 RCE via template Parameter in /rss Endpoint
    cvelistv5
  • 16 OCT 17:39Z
    WeRSS (we-mp-rss) through 1.5.3 RCE via template Parameter in /rss Endpoint
    cvelistv5