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TI-2026-75473 Aliases CVE-2026-111687GHSA-hp95-p2ww-6rvc

Eval injection in WeRSS RSS endpoint allows remote code execution

Priority HIGH 81CWE-95Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-95.

Summary

WeRSS (we-mp-rss) through 1.5.3 by rachelos has a remote code execution flaw in the template parameter of the public GET /rss/{feed_id} endpoint. Eval injection (CWE-95) lets an attacker supply a non-built-in ext value and an expression template that bypasses the eval denylist. An unauthenticated remote attacker can run OS commands as the service account. CISA's SSVC assessment rates exploitation as proof of concept.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01003 63rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
racheloswe-mp-rssup to 1.5.3—No fix listedCNA
  • we-mp-rss Vendorrachelos Affected up to 1.5.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for WeRSS (we-mp-rss).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111687
  2. 2026-10-16 Alias added: GHSA-hp95-p2ww-6rvc
  3. 2026-10-18 CISA SSVC decision points changed
  4. 2026-10-18 Priority changed: MEDIUM → HIGH

References

Advisory 1

Other 2

  • TI-2026-74111 we-mp-rss Missing Authorization via Export File Download Endpoint CVSS 4.0MEDIUM 6.3
  • TI-2026-01863 rachelos WeRSS we-mp-rss JWT auth.py default key CVSS 4.0MEDIUM 6.3
  • TI-2026-01864 rachelos WeRSS we-mp-rss tools.py download_export_file path traversal CVSS 4.0MEDIUM 5.3
  • TI-2025-12044 rachelos WeRSS we-mp-rss Webhook mps.py do_job server-side request forgery CVSS 4.0MEDIUM 5.3
  • TI-2026-02427 rachelos WeRSS we-mp-rss Article fix.py fix_html cross site scripting CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences