SB2026092224 - Multiple vulnerabilities in Wiki.js

Description

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting (CVE-ID: N/A)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

The vulnerability allows a remote user to execute arbitrary JavaScript in a victim's browser session.

The vulnerability exists due to improper neutralization of input during web page generation in the HTML Security renderer when processing page content containing Vue slot directives. A remote user can create a page with a crafted Vue slot directive to execute arbitrary JavaScript in a victim's browser session.

User interaction is required for a victim to view the stored page.

2) Authorization bypass through user-controlled key (CVE-ID: N/A)

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to take over administrative accounts and cause an administrative lockout.

The vulnerability exists due to improper access control in the Wiki.js GraphQL user-management resolvers when handling mutations with arbitrary target user IDs. A remote user can modify passwords, disable TFA, or remove group memberships of more-privileged accounts to take over administrative accounts and cause an administrative lockout.

Exploitation requires an account with the manage:users permission.

Remediation

Install update from vendor's website.

References

• https://github.com/requarks/wiki/security/advisories/GHSA-98c8-px3r-68c6
• https://github.com/requarks/wiki/security/advisories/GHSA-45cp-v5ph-2jhm