CVE-2024-13896: The WP-GeSHi-Highlight — rock-solid syntax highlighting for 259 languages WordPress plugin through 1.4.3 proce

Q: How do I fix CVE-2024-13896?

wp-geshi-highlight: upgrade to newer than 1.4.3. Exact commands for each OS are on this page.

Q: Is CVE-2024-13896 being exploited?

CVE-2024-13896 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-2024-13896 affect?

CVE-2024-13896 affects wp-geshi-highlight. Severity is medium (CVSS 6.5). The WP-GeSHi-Highlight — rock-solid syntax highlighting for 259 languages WordPress plugin through 1.4.3 processes user-supplied input as a regular expression via the wp_geshi_filter_replace_code() function, which could lead to Regular Expr

Q: How urgent is CVE-2024-13896?

Priority 38/100. Public exploit reference

Routine

MEDIUM 6.5UPGRADE

CVE-2024-13896 is a medium-severity flaw (CVSS 6.5) affecting wp-geshi-highlight. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The WP-GeSHi-Highlight — rock-solid syntax highlighting for 259 languages WordPress plugin through 1.4.3 processes user-supplied input as a regular expression via the wp_geshi_filter_replace_code() function, which could lead to Regular Expression Denial of Service (ReDoS) issue

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-1333
Published	2025-04-10
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: jgehrcke

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

Am I affected?

Timeline

2025-04-10 07:15 UTCPublished CVE record published
2026-06-17 07:02 UTCUpdated Record last modified

jgehrcke wp-geshi-highlight UPGRADE

Affected: <= 1.4.3

Fixed in: newer than 1.4.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wp-geshi-highlight || rpm -q wp-geshi-highlight || wp-geshi-highlight --version

2. UPGRADE to newer than 1.4.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wp-geshi-highlight

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wp-geshi-highlight

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-2024-13896?

wp-geshi-highlight: upgrade to newer than 1.4.3. Exact commands for each OS are on this page.

Is CVE-2024-13896 being exploited?

CVE-2024-13896 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-2024-13896 affect?

CVE-2024-13896 affects wp-geshi-highlight. Severity is medium (CVSS 6.5). The WP-GeSHi-Highlight — rock-solid syntax highlighting for 259 languages WordPress plugin through 1.4.3 processes user-supplied input as a regular expression via the wp_geshi_filter_replace_code() function, which could lead to Regular Expr

How urgent is CVE-2024-13896?

Priority 38/100. Public exploit reference

Software pages

WordPress vulnerabilities

References

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