Cross-site scripting in jsoup - #VU140665
Published: August 1, 2026
Vulnerability identifier: #VU140665
CSH Severity: Medium
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to conduct cross-site scripting.
The vulnerability exists due to improper neutralization of input during web page generation in the jsoup Cleaner when sanitizing malformed HTML with a custom Safelist that permits raw-text elements. A remote attacker can supply specially crafted HTML to conduct cross-site scripting.
User interaction is required to render the serialized output, and jsoup built-in Safelists are unaffected.
Affected software
jsoup
Remediation
Install security update from vendor's website.
jsoup - update to 1.23.1