CVE-2023-30777Advanced Custom Fields XSS
Advanced Custom Fields (Free and Pro) 5.8.10 to 5.12.5 & 6.0.0 to 6.1.5 - Reflected Cross-Site Scripting via 'post_status'
Published May 16, 2023 · Updated Apr 28, 2026 · Also known as TR-23-0269, WORDFENCE-e7ae8dcd-00b6-4afc-85bb-6697820bb37c, e7ae8dcd-00b6-4afc-85bb-6697820bb37c
Key Facts
Patch immediately- CVE-2023-30777 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting Advanced Custom Fields (Advancedcustomfields), Advanced Custom Fields Pro (wordpress-plugin).
- It is exploited in the wild, listed in Industry KEV feed since May 11, 2023. No public exploit code is known.
- EPSS estimates a 39% probability of exploitation in the next 30 days.
- Fixed versions are available, including Advanced Custom Fields 5.12.6, Advanced Custom Fields 6.1.6, Advanced Custom Fields Pro 5.12.6.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
39%
Higher than 98.5% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
51/100
Publication score, see How it works
Exploitation Verdict
KEV listed
May 11, 2023
-5 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-30777
- advisoryhttps://patchstack.com/articles/reflected-xss-in-advanced-custom-fields-plugins-affecting-2-million-sites?_s_id=cve
- advisoryhttps://patchstack.com/database/vulnerability/advanced-custom-fields-pro/wordpress-advanced-custom-fields-pro-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
- advisoryhttps://patchstack.com/database/vulnerability/advanced-custom-fields/wordpress-advanced-custom-fields-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
- advisoryUSOM advisory
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/e7ae8dcd-00b6-4afc-85bb-6697820bb37c?source=api-prod
Description
Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Engine Advanced Custom Fields Pro, WP Engine Advanced Custom Fields plugins <= 6.1.5 versions.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 11, 2023 | n/a | Not reported |
Affected Products
6 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Advanced Custom FieldsAdvancedcustomfields | >= 5.8.10, >= n/a | 6.1.6 |
| Advanced Custom Fields Prowordpress-plugin | >= 5.8.10, >= n/a | 5.12.6 |
Patched Releases
Advanced Custom Fields
5.12.6, 6.1.6
Advanced Custom Fields Pro
5.12.6
Timeline
Added to Industry KEV feed
May 11, 2023
Publicly disclosed
May 16, 2023
Last updated
Apr 28, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisorynvd.nist.gov · CVE-2023-30777
- advisorypatchstack.com · reflected-xss-in-advanced-custom-fields-plugins…
- advisorypatchstack.com · wordpress-advanced-custom-fields-pro-plugin-6-1…
- advisorypatchstack.com · wordpress-advanced-custom-fields-plugin-6-1-5-r…
- advisoryUSOM advisory
FAQ
Common Questions.
Unauth.
Affected: Advanced Custom Fields (Advancedcustomfields) versions >= 5.8.10, >= n/a; Advanced Custom Fields Pro (wordpress-plugin) versions >= 5.8.10, >= n/a. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 11, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Advanced Custom Fields 5.12.6, Advanced Custom Fields 6.1.6, Advanced Custom Fields Pro 5.12.6.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2023-30777 On Your Attack Surface?
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