CVE-2019-12934: An issue was discovered in the wp-code-highlightjs plugin through 0.6.2 for WordPress

Q: How do I fix CVE-2019-12934?

wp-code-highlightjs: upgrade to newer than 0.6.2. Exact commands for each OS are on this page.

Q: Is CVE-2019-12934 being exploited?

CVE-2019-12934 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-2019-12934 affect?

CVE-2019-12934 affects wp-code-highlightjs. Severity is high (CVSS 8.8). An issue was discovered in the wp-code-highlightjs plugin through 0.6.2 for WordPress. wp-admin/options-general.php?page=wp-code-highlight-js allows CSRF, as demonstrated by an XSS payload in the hljs_additional_css parameter.

Q: How urgent is CVE-2019-12934?

Priority 54/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2019-12934 is a high-severity flaw (CVSS 8.8) affecting wp-code-highlightjs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the wp-code-highlightjs plugin through 0.6.2 for WordPress. wp-admin/options-general.php?page=wp-code-highlight-js allows CSRF, as demonstrated by an XSS payload in the hljs_additional_css parameter.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-79, CWE-352
Published	2019-07-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: wp-code-highlightjs project

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

Am I affected?

Timeline

2019-07-20 00:15 UTCPublished CVE record published
2026-06-17 02:15 UTCUpdated Record last modified

wp-code-highlightjs project wp-code-highlightjs UPGRADE

Affected: <= 0.6.2

Fixed in: newer than 0.6.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wp-code-highlightjs || rpm -q wp-code-highlightjs || wp-code-highlightjs --version

2. UPGRADE to newer than 0.6.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wp-code-highlightjs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wp-code-highlightjs

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-2019-12934?

wp-code-highlightjs: upgrade to newer than 0.6.2. Exact commands for each OS are on this page.

Is CVE-2019-12934 being exploited?

CVE-2019-12934 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-2019-12934 affect?

CVE-2019-12934 affects wp-code-highlightjs. Severity is high (CVSS 8.8). An issue was discovered in the wp-code-highlightjs plugin through 0.6.2 for WordPress. wp-admin/options-general.php?page=wp-code-highlight-js allows CSRF, as demonstrated by an XSS payload in the hljs_additional_css parameter.

How urgent is CVE-2019-12934?

Priority 54/100. High severity; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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