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Webrecorder packages are vulnerable to XSS through 404 error handling logic

High severity GitHub Reviewed Published Sep 8, 2025 in webrecorder/wabac.js • Updated Sep 10, 2025

Package

npm @webrecorder/archivewebpage (npm)

Affected versions

< 0.15.4

Patched versions

0.15.4
npm @webrecorder/wabac (npm)
< 2.23.11
2.23.11
npm replaywebpage (npm)
< 2.3.17
2.3.17

Description

A Reflected Cross-Site Scripting (XSS) vulnerability exists in the 404 error handling logic of wabac.js v2.23.10 and below. The parameter requestURL (derived from the original request target) is directly embedded into an inline <script> block without sanitization or escaping.

This allows an attacker to craft a malicious URL that executes arbitrary JavaScript in the victim’s browser.

The scope may be limited by CORS policies, depending on the situation in which wabac.js is used.

Patches

The vulnerability is fixed in wabac.js v2.23.11.

References

@emma-sg emma-sg published to webrecorder/wabac.js Sep 8, 2025
Published by the National Vulnerability Database Sep 9, 2025
Published to the GitHub Advisory Database Sep 10, 2025
Reviewed Sep 10, 2025
Last updated Sep 10, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(11th percentile)

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

CVE-2025-58765

GHSA ID

GHSA-w765-jm6w-4hhj

Source code

Credits

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