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.

Classification

CVE ID: CVE-2023-2142

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Products

Vendor: Mozilla

Product: Nunjucks

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 11.44% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

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

Timeline