CVE-2023-23752: Joomla! Improper Access Control Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 8 Jan 2024, 326 days after the CVE record was published.

How likely is exploitation in the next 30 days?

99.8%

EPSS score, percentile 100 of all scored records

How severe?

5.3 Medium

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 29 Jan 2024. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Advisories and patches (1)

Which versions are affected?

Affected

• 4.0.0-4.2.7

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 29 January 2024.

Advisories and patches

• developer.joomla.org (Vendor advisory)

Linked from CISA's catalog entry

• https://developer.joomla.org/security-centre/894-20230201-core-improper-access-check-in-webservice-endpoints.html
• https://nvd.nist.gov/vuln/detail/CVE-2023-23752

Affected products and versions

As listed in the CVE record.

Versions not listed are: unaffected.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Joomla! contains an improper access control vulnerability that allows unauthorized access to webservice endpoints.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2023-23752 to its Known Exploited Vulnerabilities (KEV) catalog on 8 Jan 2024.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 29 Jan 2024.
• The CVE record was published on 16 Feb 2023, 326 days before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 5.3 (Medium), taken from CISA's enrichment of the record.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 99.8% (percentile 100), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact partial.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

[20230201] - Core - Improper access check in webservice endpoints

An issue was discovered in Joomla! 4.0.0 through 4.2.7. An improper access check allows unauthorized access to webservice endpoints.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-284: Improper Access Control

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline