CVE-2021-24241
MEDIUMCVSS 6.1/10EPSS 1.39%
Last modified
CVE-2021-24241 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 1.39% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Advancedcustomfields | Advanced Custom Fields | < 5.9.1 |
References
- https://github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugin/issues/1Exploit, Third Party Advisory
- https://wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83fExploit, Third Party Advisory
- https://www.advancedcustomfields.com/blog/acf-5-9-1-release/Release Notes, Vendor Advisory
- https://github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugin/issues/1Exploit, Third Party Advisory
- https://wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83fExploit, Third Party Advisory
- https://www.advancedcustomfields.com/blog/acf-5-9-1-release/Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-24241?
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.
How severe is CVE-2021-24241?
CVE-2021-24241 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.
How do I fix CVE-2021-24241?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-24241?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST