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CVE-2026-53963

Discourse

Description

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a malicious second factor name on an attacker-controlled account was not escaped in the delete confirmation dialog, allowing stored cross-site scripting when an administrator impersonated that account. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

CVSS 7.3EPSS 0.498%Risk 0.76
View source
Published
2026-07-09 22:17:05
Affected versions
<2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5
Type
Web application
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N