CVE-2026-53963CWE-79

Discourse: Stored-XSS in 2FA delete confirmation modal

High · published July 9, 2026

CVSS v3.1
7.3
EPSS
1%
Percentile
53.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00735 · 53.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-09T22:05Z
EPSS history
Timeline
  • 09 JUL 22:05Z
    Discourse: Stored-XSS in 2FA delete confirmation modal
    cvelistv5