PT-2026-57000 · Discourse · Discourse

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-53963

NVD

CVSS v3.1

7.3

High

Base vector

AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-53963

Affected Products

Discourse

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-53963 · Security Note
• https://github.com/discourse/discourse/commit/daea5214d833eacbdd3b1a78d99eb14e9cabd915 · Note
• https://github.com/discourse/discourse/commit/40de62cddadc65c328a1028ab999f3fa94adbfed · Note
• https://github.com/discourse/discourse/releases/tag/v2026.6.0 · Note
• https://github.com/discourse/discourse/commit/d92973e51a46cf6dd20c71e6068e6769b67eea5b · Note
• https://github.com/discourse/discourse/releases/tag/v2026.5.1 · Note
• https://github.com/discourse/discourse/releases/tag/v2026.4.2 · Note
• https://github.com/discourse/discourse/commit/529e17d4d570a48972e7cf64720e5dd1fdf23ca8 · Note
• https://github.com/discourse/discourse/security/advisories/GHSA-wg5x-7f23-m3r5 · Note
• https://github.com/discourse/discourse/releases/tag/v2026.1.5 · Note