CVEvulnerability

CVE-2026-53963

9.0 CRITICAL Published 2026-07-09 Modified 2026-07-14 Official page ↗
Status
Analyzed
Published
2026-07-09
Last modified
2026-07-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.3 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS 3.1 ([email protected])
9.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Weaknesses
CWE-79

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.

Affected configurations

• discourse discourse (>= 2026.1.0 < 2026.1.5) • discourse discourse (>= 2026.4.0 < 2026.4.2) • discourse discourse (>= 2026.5.0 < 2026.5.1) • discourse discourse 2026.6.0

Related

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References