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Vulnerabilities

Vulnerability · CVE-2023-30777

advancedcustomfields advanced_custom_fields Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Published May 11, 2023 · catalog updated May 11, 2023 · advancedcustomfields advanced_custom_fields Improper Neutralization

Patch now

CVE-2023-30777 is in the CISA known-exploited catalog. Confirm advancedcustomfields advanced_custom_fields Improper Neutralization against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (advancedcustomfields advanced_custom_fields Improper Neutralization).
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
39.00%
Remediation
Remediation guidance
Affected products
stated advanced_custom_fields · vendor advancedcustomfields advanced_custom_fields

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Engine Advanced Custom Fields Pro, WP Engine Advanced Custom Fields plugins <= 6.1.5 versions.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated advanced_custom_fields<= 6.1.5
  • vendor advancedcustomfields advanced_custom_fieldsversion unspecified

How to fix CVE-2023-30777

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-30777 is in the CISA known-exploited catalog. Confirm advancedcustomfields advanced_custom_fields Improper Neutralization against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with <= 6.1.5. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 39.00%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 11, 2023 · VulnCheck KEV

    Detected

    Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Engine Advanced Custom Fields Pro, WP Engine Advanced Custom Fields plugins <= 6.1.5 versions.

  2. May 11, 2023 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2023-30777

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-30777

    30-day exploitation probability 39.0%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2023-30777

    Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Engine Advanced Custom Fields Pro, WP Engine Advanced Custom Fields plugins <= 6.1.5 versions.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.