CVE-2023-2142: In Nunjucks versions prior to version 3.2.4, it was possible to bypass the restrictions which are provided by

Q: How do I fix CVE-2023-2142?

nunjucks: upgrade to 3.2.4. Exact commands for each OS are on this page.

Q: Is CVE-2023-2142 being exploited?

CVE-2023-2142 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-2142 affect?

CVE-2023-2142 affects nunjucks. Severity is medium (CVSS 6.1). 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 t

Q: How urgent is CVE-2023-2142?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2023-2142 is a medium-severity flaw (CVSS 6.1) affecting nunjucks. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-11-26
Last modified	2026-06-17

Publisher (CNA): Mozilla Corporation · Vendor: mozilla

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-11-26 12:15 UTCPublished CVE record published
2026-06-17 05:51 UTCUpdated Record last modified

mozilla nunjucks UPGRADE

Affected: < 3.2.4

Fixed in: 3.2.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nunjucks || rpm -q nunjucks || nunjucks --version

2. UPGRADE to 3.2.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nunjucks

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nunjucks

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-2142?

nunjucks: upgrade to 3.2.4. Exact commands for each OS are on this page.

Is CVE-2023-2142 being exploited?

CVE-2023-2142 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-2142 affect?

CVE-2023-2142 affects nunjucks. Severity is medium (CVSS 6.1). 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 t

How urgent is CVE-2023-2142?

Priority 29/100. No elevated risk signals yet.

References

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