Cross-site scripting in OpenClaw - #VU128799
Published: May 1, 2026
Vulnerability identifier: #VU128799
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/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: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary JavaScript in the exported HTML viewer context.
The vulnerability exists due to cross-site scripting in the exported session HTML viewer when rendering untrusted session content containing raw HTML markdown tokens or unescaped metadata fields. A remote attacker can create a crafted session and trick the victim into opening the exported HTML file to execute arbitrary JavaScript in the exported HTML viewer context.
User interaction is required to open a crafted exported HTML session file.
Remediation
Install security update from vendor's website.