Vulnerability CVE-2021-24241
Published: 2021-04-22   Modified: 2021-04-23

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.

Type:

CWE-79

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

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Advancedcustomfields -> Advanced custom fields 

 References:
https://github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugin/issues/1
https://wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83f
https://www.advancedcustomfields.com/blog/acf-5-9-1-release/
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