Cross-site scripting in Shaarli - #VU132255
Published: May 25, 2026
Vulnerability identifier: #VU132255
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Shaarli
Affected software:
Shaarli
Shaarli
Detailed vulnerability description
The vulnerability allows a local privileged user to execute arbitrary script in the victim's browser.
The vulnerability exists due to cross-site scripting in the Bookmark Description markdown-to-html conversion process when processing markdown reference-style links. A local privileged user can inject a malicious javascript: URI in a crafted bookmark description to execute arbitrary script in the victim's browser.
User interaction is required to click the rendered link on the homepage.
Remediation
Install security update from vendor's website.