XSS in Webrecorder Wabac.js
CVE-2025-58765
wabac.js provides a full web archive replay system, or 'wayback machine', using Service Workers. A Reflected Cross-Site Scripting (XSS) vulnerability exists in the 404 error handling logic of wabac.js v2.23.10 and below. The parameter `req…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (14.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.
Affected products
- Webrecorder Wabac.js — versions < 2.23.11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-58765?
- CVE-2025-58765 is a high-severity vulnerability in Webrecorder Wabac.js, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2025-09-09.
- How severe is CVE-2025-58765?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2025-58765 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.