PT-2026-54903 · Checkuser · Checkuser

Published 2026-07-01 · Updated 2026-07-01 · CVE-2026-58034

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions CheckUser versions 1.46.0-rc.0 through 1.46.0-rc.x

Description An Improper Neutralization of Input During Web Page Generation, known as Cross-site Scripting (XSS), occurs in the modules/ext.CheckUser.TempAccounts/components/blockConnectedTempAccountsField.Vue file. XSS is a flaw where an application includes untrusted data in a web page without proper validation or encoding, allowing an attacker to execute malicious scripts in the victim's browser.

Recommendations Update CheckUser to version 1.46.0.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-58034

Affected Products

Checkuser

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-58034 · Security Note
• https://t.me/cveNotify/183681 · Telegram Post
• https://phabricator.wikimedia.org/T428820 · Note