CVE-2026-25349
Published: 25 March 2026
Summary
CVE-2026-25349 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-2026-25349 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-Site Scripting (XSS) under CWE-79, affecting the Loobek WordPress theme developed by skygroup. The issue impacts all versions of Loobek from its initial release through those prior to 1.5.2. It 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 network accessibility, low attack complexity, no required privileges, user interaction, and scope change with low impacts across confidentiality, integrity, and availability.
Attackers can exploit this vulnerability remotely without authentication by crafting malicious payloads that are reflected back in dynamically generated web pages. Exploitation requires tricking a user into interacting with the payload, such as clicking a malicious link or submitting crafted input on an affected site running a vulnerable Loobek theme version. Successful exploitation allows attackers to execute arbitrary scripts in the victim's browser context, potentially leading to session hijacking, data theft, or further phishing within the scope of the compromised site.
Patchstack advisories detail the vulnerability in the WordPress Loobek theme and recommend updating to version 1.5.2 or later, where the issue is fixed, as the primary mitigation. No workarounds are specified beyond ensuring input sanitization in custom implementations if patching is not immediately feasible.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-15664
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in skygroup Loobek loobek allows Reflected XSS.This issue affects Loobek: from n/a through < 1.5.2.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress theme directly enables remote unauthenticated exploitation of web app (T1190), arbitrary JavaScript execution in browser (T1059.007), and session hijacking/data theft (T1185).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces validation and sanitization of user inputs to prevent reflected XSS payloads from being improperly neutralized during web page generation in the Loobek theme.
Requires filtering of information outputs to encode or escape potentially malicious scripts reflected in dynamically generated web pages.
Mandates timely flaw remediation by patching the vulnerable Loobek WordPress theme to version 1.5.2 or later as recommended.