CVE-2026-72727 PUBLISHED

Discourse: Stored XSS in the moderation review queue

Assigner: GitHub_M
Reserved: 10.08.2026 Published: 10.08.2026 Updated: 10.08.2026

Discourse is an open-source discussion platform. Prior to 026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, a low-privileged user could place crafted content in the moderation review queue that executed stored cross-site scripting when a moderator viewed it on a site with a modified or disabled default Content Security Policy. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 4.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Active

CVSS 4.0

Product Status

Vendor	discourse
Product	discourse
Versions	Version < 2026.1.6 is affected Version >= 2026.5.0-latest, < 2026.5.2 is affected Version >= 2026.6.0-latest, < 2026.6.1 is affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-pq6q-p5g3-rj54

Problem Types

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