CVE-2026-45343
LinkAce - Stored XSS via Unsanitized SSO User's Name Rendered in Admin Audit Log Allows Session Hijacking
Description
LinkAce is a self-hosted archive to collect website links. Prior to 2.5.6, LinkAce contains a stored cross-site scripting vulnerability that allows a low-privilege user to execute arbitrary JavaScript in an administrator's browser session. This affects instances configured with SSO/OAuth authentication, which is one of the supported authentication methods in LinkAce. An attacker who sets their OAuth display name to a malicious script and then creates an API token will plant a persistent XSS payload in the audit log. When any admin navigates to /system/audit, the payload executes in the admin's browser context. This enables session cookie theft, CSRF token exfiltration (exposed in the la-app-data meta tag), or any other action the admin can perform. This vulnerability is fixed in 2.5.6.
INFO
Published Date :
May 28, 2026, 10:17 p.m.
Last Modified :
July 21, 2026, 10:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update LinkAce to version 2.5.6 or later.
- Review and sanitize user-provided data, especially in SSO/OAuth configurations.
- Limit privileges for users creating API tokens.
- Regularly audit system logs for suspicious entries.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45343.
| URL | Resource |
|---|---|
| https://github.com/Kovah/LinkAce/security/advisories/GHSA-jx4g-ph82-x9mm | |
| https://github.com/Kovah/LinkAce/security/advisories/GHSA-jx4g-ph82-x9mm |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45343 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45343
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45343 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45343 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Translation Title: LinkAce de Kovah, Description: LinkAce es un archivo autoalojado para recopilar enlaces de sitios web. Anteriormente a la 2.5.6, LinkAce contiene una vulnerabilidad de cross-site scripting almacenado que permite a un usuario con bajos privilegios ejecutar JavaScript arbitrario en la sesión del navegador de un administrador. Esto afecta a las instancias configuradas con autenticación SSO/OAuth, que es uno de los métodos de autenticación soportados en LinkAce. Un atacante que establece su nombre de visualización de OAuth a un script malicioso y luego crea un token de API plantará una carga útil de XSS persistente en el registro de auditoría. Cuando cualquier administrador navega a /system/audit, la carga útil se ejecuta en el contexto del navegador del administrador. Esto permite el robo de la cookie de sesión, la exfiltración de tokens CSRF (expuesto en la metaetiqueta la-app-data) o cualquier otra acción que el administrador pueda realizar. Esta vulnerabilidad está corregida en la versión 2.5.6. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Kovah', 'product': 'LinkAce', 'versions': [{'status': 'affected', 'version': '< 2.5.6'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45343', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-30T02:19:30.595740Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 30, 2026
Action Type Old Value New Value Added Reference https://github.com/Kovah/LinkAce/security/advisories/GHSA-jx4g-ph82-x9mm -
New CVE Received by [email protected]
May. 28, 2026
Action Type Old Value New Value Added Description LinkAce is a self-hosted archive to collect website links. Prior to 2.5.6, LinkAce contains a stored cross-site scripting vulnerability that allows a low-privilege user to execute arbitrary JavaScript in an administrator's browser session. This affects instances configured with SSO/OAuth authentication, which is one of the supported authentication methods in LinkAce. An attacker who sets their OAuth display name to a malicious script and then creates an API token will plant a persistent XSS payload in the audit log. When any admin navigates to /system/audit, the payload executes in the admin's browser context. This enables session cookie theft, CSRF token exfiltration (exposed in the la-app-data meta tag), or any other action the admin can perform. This vulnerability is fixed in 2.5.6. Added CVSS V4.0 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 Added CWE CWE-79 Added Reference https://github.com/Kovah/LinkAce/security/advisories/GHSA-jx4g-ph82-x9mm