CVE Explorer
CVE-2026-8809
The Advanced Custom Fields: Extended plugin for WordPress is vulnerable to Privilege Escalation via Validation Bypass in all versions up to and including 0.9.2.5. The vulnerability exists due to the after_validate_save_post() function unconditionally trusting the attacker-controlled _acf_post_id POST parameter — with no authentication or integrity verification — to select a cleanup branch that silently discards all validation errors not prefixed with acfe:. This makes it possible for unauthentic
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Advanced Custom Fields: Extended","vendor":"hwk-fr","versions":[{"lessThanOrEqual":"0.9.2.5","status":"affected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-269","description":"CWE-269 Improper Privilege Management","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/problemTypes/0/descriptions/0
Source references
6 source assertions{"url":"https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.9.2.4/includes/hooks.php#L636"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/references/2
{"url":"https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.9.2.4/includes/module-acf.php#L141"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/references/1
{"url":"https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.9.2.4/includes/modules/form/module-form-action-user.php#L715"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/references/3
{"url":"https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.9.2.4/includes/modules/form/module-form-front.php#L94"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/references/4
{"url":"https://plugins.trac.wordpress.org/changeset/3551665/acf-extended"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/references/5
{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/bd332f49-5aa9-4207-89db-84692a6430e0?source=cve"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:787c518eb888ca40aa9918246cddc10ec795020e75516989ff66d08ca44bfd00 · sha256:2dad7bd4087385b8… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.