CVE-2023-2142

Nunjucks autoescape bypass leads to cross site scripting

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory github.com
Affected: Mozilla Nunjucks
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2023-2142?
CVE-2023-2142 has been scored as a medium severity vulnerability.
How to fix CVE-2023-2142?
To fix CVE-2023-2142, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-2142 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-2142 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-2142?
CVE-2023-2142 affects Mozilla Nunjucks.
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