CVE-2026-72730
Discourse: Stored XSS chat-transcript username unescaped in Rich Text Editor
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
0th
Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, the Rich Text Editor rendered a chat-transcript username as HTML, allowing stored cross-site scripting. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.
| CWE | CWE-79 |
| Vendor | discourse |
| Product | discourse |
| Published | Aug 10, 2026 |
| Last Updated | Aug 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
discourse / discourse
< 2026.1.6 >= 2026.5.0-latest, < 2026.5.2 >= 2026.6.0-latest, < 2026.6.1
References
github.com: https://github.com/discourse/discourse/security/advisories/GHSA-wg48-qxjc-f459 github.com: https://github.com/discourse/discourse/commit/32920affe4ad97b461ca2ae2f664c5fefc374baf github.com: https://github.com/discourse/discourse/commit/3fb1e8ead0d4f48d2cf55c8110825c7e8a6a45f5 github.com: https://github.com/discourse/discourse/commit/7eb35d076ab9b6a612e86182336ce9787ce402ea github.com: https://github.com/discourse/discourse/commit/9633b8ecaf5a99f0407f5261b9bd1a05f7dac529