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TI-2025-29446 Aliases CVE-2025-46813

Private data leak on login-required Discourse sites

Priority LOW 39CWE-200Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

Discourse is an open-source community platform. A data leak vulnerability affects sites deployed between commits 10df7fdee060d44accdee7679d66d778d1136510 and 82d84af6b0efbd9fa2aeec3e91ce7be1a768511b. On login-required sites, the leak meant that some content on the site's homepage could be visible to unauthenticated users. Only login-required sites that got deployed during this timeframe are affected, roughly between April 30 2025 noon EDT and May 2 2025, noon EDT. Sites on the stable branch are unaffected. Private content on an instance's homepage could be visible to unauthenticated users on login-required sites. Versions of 3.5.0.beta4 after commit 82d84af6b0efbd9fa2aeec3e91ce7be1a768511b are not vulnerable to the issue. No workarounds are available. Sites must upgrade to a non-vulnerable version of Discourse.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00429 37th 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
None
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
discoursediscourse10df7fdee060d44accdee7679d66d778d1136510 – 82d84af6b0efbd9fa2aeec3e91ce7be1a768511b—No fix listedCNA
  • discourse Vendordiscourse Affected 10df7fdee060d44accdee7679d66d778d1136510 – 82d84af6b0efbd9fa2aeec3e91ce7be1a768511b Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*before 3.5.0Vulnerablediscourse
cpe:2.3:a:discourse:discourse:3.5.0:beta1:*:*:beta:*:*:*3.5.0 beta1Vulnerablediscourse
cpe:2.3:a:discourse:discourse:3.5.0:beta2:*:*:beta:*:*:*3.5.0 beta2Vulnerablediscourse
cpe:2.3:a:discourse:discourse:3.5.0:beta3:*:*:beta:*:*:*3.5.0 beta3Vulnerablediscourse
  • cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:* Versions before 3.5.0 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:3.5.0:beta1:*:*:beta:*:*:* Versions 3.5.0 beta1 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:3.5.0:beta2:*:*:beta:*:*:* Versions 3.5.0 beta2 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:3.5.0:beta3:*:*:beta:*:*:* Versions 3.5.0 beta3 Vulnerable ·discourse

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-46813

References

Patch 2

Advisory 1

  • TI-2021-19656 Denial of Service in discourse CVSS 3.1MEDIUM 6.8
  • TI-2024-36150 Potential Backup file leaked via Nginx in Discourse CVSS 3.1HIGH 7.5
  • TI-2021-18002 RCE via malicious SNS subscription payload CVSS 3.1CRITICAL 10.0
  • TI-2026-24651 Discourse: Open redirect via `sso_destination_url` cookie in `enter` CVSS 4.0MEDIUM 5.1
  • TI-2026-22278 Discourse leaks private topic title and post excerpt via user action API endpoint CVSS 4.0HIGH 8.7
  • TI-2023-24152 Unauthenticated access to new private chat messages in Discourse CVSS 3.1HIGH 7.5
See all 262 →

Sources

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