CVE-2023-2142

Nunjucks autoescape bypass leads to cross site scripting

State: Published
Severity: 6.1 Medium
Published: Nov 26, 2024
Updated: Nov 27, 2024
Reserved: Apr 18, 2023

Description

In Nunjucks versions prior to version 3.2.4, it was possible to bypass the restrictions which are provided by the autoescape functionality. If there are two user-controlled parameters on the same line used in the views, it was possible to inject cross site scripting payloads using the backslash \ character.

Scores

CVSS	Score	Vector	Source
3.1	6.1 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
NunjucksMozilla	before 3.2.4Affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1825980issue-tracking
https://github.com/mozilla/nunjucks/security/advisories/GHSA-x77j-w7wf-fjmwvendor-advisory

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