How severe is CVE-2021-24241?

CVE-2021-24241 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24241 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24241?

CVE-2021-24241 affects Advancedcustomfields Advanced Custom Fields. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24241?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-24241 published?

CVE-2021-24241 was published on 2021-04-22 and last updated on 2026-06-17.

CVE-2021-24241

CVE-2021-24241 is a medium-severity vulnerability in Advancedcustomfields Advanced Custom Fields with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Advancedcustomfields Advanced Custom Fields
Published: 2021-04-22
Last modified: 2026-06-17

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.

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 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24241 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24241?: CVE-2021-24241 affects Advancedcustomfields Advanced Custom Fields. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24241?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24241 published?: CVE-2021-24241 was published on 2021-04-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:advancedcustomfields:advanced_custom_fields:*:*:*:*:pro:wordpress:*:*

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