CVE-2024-45429: Cross-site scripting vulnerability exists in Advanced Custom Fields versions 6.3.5 and earlier and Advanced Cu

Q: How do I fix CVE-2024-45429?

advanced custom fields: upgrade to newer than 6.3.5. Exact commands for each OS are on this page.

Q: Is CVE-2024-45429 being exploited?

CVE-2024-45429 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-2024-45429 affect?

CVE-2024-45429 affects advanced custom fields. Severity is medium (CVSS 6.1). Cross-site scripting vulnerability exists in Advanced Custom Fields versions 6.3.5 and earlier and Advanced Custom Fields Pro versions 6.3.5 and earlier. If an attacker with the 'capability' setting privilege which is set in the product set

Q: How urgent is CVE-2024-45429?

Priority 30/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2024-45429 is a medium-severity flaw (CVSS 6.1) affecting advanced custom fields. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting vulnerability exists in Advanced Custom Fields versions 6.3.5 and earlier and Advanced Custom Fields Pro versions 6.3.5 and earlier. If an attacker with the 'capability' setting privilege which is set in the product settings stores an arbitrary script in the field label, the script may be executed on the web browser of the logged-in user with the same privilege as the attacker's.

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 64%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-09-04
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: wpengine

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

Am I affected?

Timeline

2024-09-04 23:15 UTCPublished CVE record published
2026-06-17 07:54 UTCUpdated Record last modified

wpengine advanced custom fields UPGRADE

Affected: <= 6.3.5

Fixed in: newer than 6.3.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy advanced-custom-fields || rpm -q advanced-custom-fields || advanced-custom-fields --version

2. UPGRADE to newer than 6.3.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade advanced-custom-fields

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade advanced-custom-fields

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-2024-45429?

advanced custom fields: upgrade to newer than 6.3.5. Exact commands for each OS are on this page.

Is CVE-2024-45429 being exploited?

CVE-2024-45429 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-2024-45429 affect?

CVE-2024-45429 affects advanced custom fields. Severity is medium (CVSS 6.1). Cross-site scripting vulnerability exists in Advanced Custom Fields versions 6.3.5 and earlier and Advanced Custom Fields Pro versions 6.3.5 and earlier. If an attacker with the 'capability' setting privilege which is set in the product set

How urgent is CVE-2024-45429?

Priority 30/100. No elevated risk signals yet.

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CVE-2024-9529 MEDIUM 6.6 UPGRADE The Secure Custom Fields WordPress plugin before 6.3.9, Secure Custom Fields WordPress plugin before 6.3.6.3,

References

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