Advanced Custom Field Pro < 5.9.1 - Reflected Cross-Site Scripting (XSS)
Priority LOW 30CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
The Advanced Custom Fields Pro WordPress plugin before 5.9.1 did not properly escape the generated update URL when outputting it in an attribute, leading to a reflected Cross-Site Scripting issue in the update settings page.
Why it matters now
EPSS 0.01387 72nd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed Advanced Custom Fields Pro (Unknown): 5.9.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Advanced Custom Fields Pro | 5.9.1 to before 5.9.1 | 5.9.1 | Patch available | CNA |
- Advanced Custom Fields Pro VendorUnknown Affected 5.9.1 to before 5.9.1 Fixed in 5.9.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:advancedcustomfields:advanced_custom_fields:*:*:*:*:pro:wordpress:*:* | before 5.9.1 | Vulnerable | Advanced Custom Fields |
- cpe:2.3:a:advancedcustomfields:advanced_custom_fields:*:*:*:*:pro:wordpress:*:* Versions before 5.9.1 Vulnerable ·Advanced Custom Fields
Remediation
- Fix · CNA Advanced Custom Fields Pro (Unknown) Fixed in 5.9.1
Timeline
- 2026-10-02 Threatist record created from CVE-2021-24241
- 2026-10-03 Alias added: GHSA-qrc3-2vgc-v73w
References
More Advanced Custom Fields vulnerabilities
- TI-2023-01131 Advanced Custom Fields - Contributor+ PHP Object Injection CVSS 3.1HIGH 8.8
- TI-2024-04251 Advanced Custom Fields < 6.3 - Contributor+ Custom Field Access CVSS 3.1HIGH 7.5
- TI-2024-08839 Secure Custom Fields < 6.3.6.3 - Admin+ Remote Code Execution CVSS 3.1MEDIUM 6.6
- TI-2023-14589 WordPress Advanced Custom Fields / Advanced Custom Fields PRO plugins <= 6.1.5 vulnerable to Cross Site Scripting (XSS) CVSS 3.1HIGH 7.1
- TI-2022-02396 Advanced Custom Fields 5.0-5.12.2 - Unauthenticated File Upload CVSS 3.1HIGH 8.8
- TI-2022-19331 WordPress Advanced Custom Fields Plugin 3.1.1-6.0.2 is vulnerable to Sensitive Data Exposure CVSS 3.1HIGH 7.5
Sources
- CVE-2021-24241 · CVE Program
- CVE-2021-24241 · NVD
- FIRST EPSS
- GHSA-qrc3-2vgc-v73w · GitHub Advisory Database · CC BY 4.0
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