CVE-2026-28126
Published: 05 March 2026
Summary
CVE-2026-28126 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 Exploit Public-Facing Application (T1190); 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-2026-28126 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-Site Scripting (XSS) under CWE-79, affecting the RH Frontend Publishing Pro WordPress plugin developed by sizam (rh-frontend). This issue impacts all versions of the plugin from its initial release through those prior to 4.3.4. The vulnerability has a CVSS v3.1 base score of 7.1, reflecting its high severity due to network accessibility and scope change.
Attackers can exploit this vulnerability remotely over the network with low complexity and no required privileges, though it necessitates user interaction such as clicking a malicious link. Successful exploitation enables reflected XSS, allowing attackers to inject and execute arbitrary scripts in the context of a victim's browser. This can result in low-level impacts on confidentiality, integrity, and availability, such as limited data exposure, minor tampering, or denial of service within the changed security scope.
The Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/rh-frontend/vulnerability/wordpress-rh-frontend-publishing-pro-plugin-4-3-2-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve details the vulnerability and recommends updating to version 4.3.4 or later, where the issue is addressed. Security practitioners should prioritize patching affected WordPress sites running vulnerable versions of the RH Frontend Publishing Pro plugin.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9778
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in sizam RH Frontend Publishing Pro rh-frontend allows Reflected XSS.This issue affects RH Frontend Publishing Pro: from n/a through < 4.3.4.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly enables remote exploitation of the web app (T1190) via malicious links (T1566.002) to achieve arbitrary JavaScript execution in the browser (T1059.007).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and neutralization of untrusted input before web page generation, preventing the reflected XSS payload injection described in CVE-2026-28126.
Requires filtering or encoding of information output to browsers, blocking execution of attacker-supplied scripts in the reflected XSS scenario.
Mandates timely remediation of known flaws such as the input neutralization defect fixed in RH Frontend Publishing Pro 4.3.4.