Discourse: Stored XSS in staff action logs injects staff UI

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72725
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 16:19:49 UTC
Updated2026-08-10 19:17:33 UTC
DescriptionDiscourse is an open-source discussion platform. Prior to 2026.1.6, the staff action log model rendered unescaped previous and new value fields that could inject stored cross-site scripting into the staff interface. The issue is fixed in 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Discourse Discourse affected < 2026.1.6 Not specified
CNA Discourse Discourse affected >= 2026.5.0, < 2026.5.2 Not specified
CNA Discourse Discourse affected >= 2026.6.0, < 2026.6.1 Not specified

References

ReferenceSourceLinkTags
github.com/discourse/discourse/commit/fd44510b4303e7f8f0b42bd070a2d42d3c... [email protected] github.com
github.com/discourse/discourse/security/advisories/GHSA-8x29-vv56-wj6v [email protected] github.com
github.com/discourse/discourse/commit/66601a6e6eeeabfcb06d2f692d68534be1... [email protected] github.com
github.com/discourse/discourse/commit/74ae22d85f4e13c7c7f2e3c13fce023fee... [email protected] github.com
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