CVE-2026-28137
Published: 05 March 2026
Summary
CVE-2026-28137 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique JavaScript (T1059.007); ranked at the 14.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2026-28137 is an improper neutralization of input during web page generation vulnerability, enabling reflected cross-site scripting (XSS) as classified under CWE-79. It affects the QuanticaLabs MediCenter - Health Medical Clinic WordPress theme, impacting all versions from n/a through 14.9 inclusive. Published on 2026-03-05T06:16:48.460, the vulnerability carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating high severity due to its network accessibility and scope change.
Remote attackers require no privileges and can exploit this over the network with low complexity, though user interaction is necessary, such as clicking a malicious link. By crafting a URL that reflects unsanitized input back to the user, an attacker can execute arbitrary JavaScript in the victim's browser within the site's context, potentially compromising low levels of confidentiality, integrity, and availability, such as session token theft or page manipulation.
The Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/medicenter/vulnerability/wordpress-medicenter-health-medical-clinic-wordpress-theme-theme-14-9-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve documents the reflected XSS issue in the MediCenter WordPress theme up to version 14.9.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9786
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in QuanticaLabs MediCenter - Health Medical Clinic medicenter allows Reflected XSS.This issue affects MediCenter - Health Medical Clinic: from n/a through <= 14.9.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress theme directly enables arbitrary JavaScript execution (T1059.007) via crafted malicious links (T1204.001) against an internet-accessible application (T1190).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires validation and sanitization of all web inputs to block the unsanitized reflected parameters that enable this reflected XSS.
Mandates filtering of information returned in HTTP responses, directly stopping the theme from echoing attacker-controlled script in the victim's browser context.
Restricts execution of mobile code (JavaScript) received from external sources, limiting the impact of any successfully reflected XSS payload.