CVE-2021-24241

Advanced Custom Field Pro < 5.9.1 - Reflected Cross-Site Scripting (XSS)

MEDIUM
6.1
CVSS Score
Published: April 22, 2021 at 09:00 PM UTC
Updated: June 17, 2026 at 03:39 AM UTC
1 product affected across 1 vendorAdvanced Custom Fields

Using Advanced Custom Fields Pro by Unknown?

Get instant alerts when new vulnerabilities affect Advanced Custom Fields Pro - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.1
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.9.1
Affected range stops below 5.9.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card