CVE-2026-58034CWE-79

Stored XSS through a system message when blocking a temporary account that's related to other temporary accounts

published July 1, 2026

CVSS v4.0
0.0
EPSS
0%
Percentile
20.1
In the wild
Unconfirmed
What it is

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser.

This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/blockConnectedTempAccountsField.Vue.

This issue affects CheckUser: from 1.46.0-rc.0 before 1.46.0.

The record
Technical detail
CVSS v4.0
0.0 · NONE
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00287 · 20.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-01T14:21Z
EPSS history
Timeline
  • 01 JUL 14:21Z
    Stored XSS through a system message when blocking a temporary account that's related to other temporary accounts
    cvelistv5