CVE-2025-67618
Published: 19 March 2026
Summary
CVE-2025-67618 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 3.1th 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-2025-67618 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS), in the Brookside WordPress theme developed by ArtstudioWorks. The flaw affects all versions of Brookside up to and including 1.4, stemming from CWE-79, where user input is not properly sanitized before being reflected back in web page generation.
The vulnerability has 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 it can be exploited over the network with low complexity and no privileges required, though it necessitates user interaction such as clicking a malicious link. A remote attacker can craft a malicious URL that, when visited by a victim on an affected site, injects and executes arbitrary JavaScript in the victim's browser context due to the changed scope, potentially leading to low-level impacts on confidentiality (e.g., session token theft), integrity (e.g., data modification), and availability.
Patchstack has documented the issue in its vulnerability database for the Brookside WordPress theme, highlighting the Reflected XSS in version 1.4 and prior, with details available at https://patchstack.com/database/Wordpress/Theme/brookside/vulnerability/wordpress-brookside-theme-1-4-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve. Mitigation involves updating to a patched version of the theme beyond 1.4, as indicated by the affected version range.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-208865
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ArtstudioWorks Brookside brookside allows Reflected XSS.This issue affects Brookside: from n/a through <= 1.4.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress theme directly enables exploitation of a web application vulnerability over the network.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of user inputs to prevent improper neutralization leading to reflected XSS payload injection.
Mandates filtering and encoding of information outputs to neutralize unsanitized user input reflected in web pages.
Ensures timely identification, reporting, and patching of software flaws like this XSS vulnerability in the Brookside theme.