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Unauthenticated SSRF in Artalk via comment page title fetch

Priority HIGH 70CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

Artalk before 2.10.1 contains an unauthenticated server-side request forgery flaw (CWE-918) that lets remote attackers make the server fetch arbitrary URLs. Anonymous comments submitted to the comment API can set a page key to an internal URL, which the server fetches after only scheme validation. The attacker can then read the fetched page title through the public comment list.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Artalk before 2.10.1 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to make the server fetch arbitrary URLs by submitting anonymous comments to /api/v2/comments. Attackers can set a page_key to an internal URL, which GetTitleByURL fetches after only scheme validation, then read the page title through the public comment list.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00394 33rd percentileScored 2026-11-08
Fix Fixed Artalk (ArtalkJS): 2.10.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
ArtalkJSArtalkbefore 2.10.12.10.1Patch availableCNA
  • Artalk VendorArtalkJS Affected before 2.10.1 Fixed in 2.10.1 Patch available CNA

Remediation

Upgrade ArtalkJS Artalk to version 2.10.1, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA Artalk (ArtalkJS) Fixed in 2.10.1

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-117565
  2. 2026-10-27 Alias added: GHSA-m4rh-857p-qh9p
  3. 2026-10-28 Priority changed: MEDIUM → LOW
  4. 2026-11-05 CISA SSVC decision points changed
  5. 2026-11-05 Priority changed: LOW → HIGH

References

Sources