CVE-2024-2123
Published: 13 March 2024
Summary
CVE-2024-2123 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Ultimatemember Ultimate Member. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 3.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
The Ultimate Member plugin for WordPress, used for user profiles, registration, login, member directories, and content restriction, contains a stored cross-site scripting vulnerability in all versions through 2.8.3. The flaw stems from insufficient input sanitization and output escaping on multiple parameters within the members-grid.php and members-list.php templates, allowing malicious scripts to be persisted in pages served by the plugin. It is tracked as CWE-79 with a CVSS 3.1 score of 7.2.
Unauthenticated attackers can supply crafted input to the affected parameters over the network and store executable scripts that run in the browsers of subsequent visitors, including administrators, without requiring user interaction. Successful exploitation yields limited impacts on confidentiality and integrity while changing scope to affect other site components.
The EPSS score for this CVE reached a peak of 0.4129 after disclosure before settling at a current value of 0.2956, indicating a clear rise in exploitation interest following public release. No mitigation guidance or patch details appear in the supplied references, which consist solely of links to the vulnerable template files.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-27087
Vulnerability details
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the several parameters in all versions up to, and including, 2.8.3 due to insufficient input…
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sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.