PT-2026-44543 · Linkace · Linkace

Published 2026-05-28 · Updated 2026-05-30 · CVE-2026-45343

Positive Technologies (AI Summary)

CVSS v4.0

8.5

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions LinkAce versions prior to 2.5.6

Description A stored cross-site scripting issue exists in instances configured with SSO/OAuth authentication. A low-privilege user can execute arbitrary JavaScript in an administrator's browser session by setting their OAuth display name to a malicious script and creating an API token, which plants a persistent payload in the audit log. When an administrator accesses the '/system/audit' endpoint, the payload executes, potentially leading to session cookie theft, CSRF token exfiltration via the la-app-data meta tag, or other administrative actions.

Recommendations Update to version 2.5.6.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-45343

Affected Products

Linkace

References · 3

• 🔥 https://github.com/Kovah/LinkAce/security/advisories/GHSA-jx4g-ph82-x9mm · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-45343 · Security Note
• https://t.me/cveNotify/165294 · Telegram Post