CVE-2024-2544: Popup Builder <= 4.3.0 - Missing Authorization in Multiple AJAX Actions

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 30 Oct 2026.

VulnCheck KEV lists it since 2 Nov 2026. It cites 1 public report, the first from 2 Nov 2026.

• patchstack.com

How likely is exploitation in the next 30 days?

0.3%

EPSS score, percentile 19.3 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

7.4 High

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

No patch or vendor advisory is listed in the CVE record. Check popupbuilder's advisories.

Which versions are affected?

Affected

• 4.3.0 and earlier

Versions by product

Source: CISA KEV 2026.10.30, as of 30 Oct 2026; VulnCheck KEV, as of 2 Nov 2026; FIRST EPSS, as of 2 Nov 2026; CVE List, as of 2 Nov 2026. About the data.

Description

Popup Builder <= 4.3.0 - Missing Authorization in Multiple AJAX Actions

The Popup Builder plugin for WordPress is vulnerable to unauthorized modification of data and loss of data due to a missing capability check on all AJAX actions. This makes it possible for authenticated attackers, with subscriber-level access and above, to perform multiple unauthorized actions, such as deleting subscribers, and importing subscribers to conduct stored cross-site scripting attacks.

Source: CVE List, as of 2 Nov 2026. About the data.

What to do

Advisories and patches

No patch, vendor advisory or mitigation is listed in the CVE record. Check popupbuilder's own security advisories for a fix, and compare your version with the affected versions below.

This summary is based on the CVE record as of 2 Nov 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Source: CVE List, as of 2 Nov 2026. About the data.

Timeline