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CVE-2026-53963

nvd nist
Published: Jul 9, 2026Modified: Jul 14, 2026

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9.0
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Exploitability: 2.3 / Impact: 6.0
Source: NVD

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 (4)

Products: Discourse: Discourse
Discourse
1 product
Discourse
Configuration A
4 vulnerable
Vulnerable SoftwareAffected Versions
Discourse
Discourse
From 2026.1.0 to 2026.1.5
Discourse
From 2026.4.0 to 2026.4.2
Discourse
From 2026.5.0 to 2026.5.1
Discourse
Version 2026.6.0

Related CWEs

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (9)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
MitigationVendor Advisory

Timeline

No history available yet.