CVE-2026-27358

Vulnerability

Overview

The Architecturer WordPress theme, developed by ThemeGoods, contains a reflected Cross-Site Scripting (XSS) vulnerability due to improper neutralization of user input during web page generation [1]. This flaw affects all versions from n/a through 3.9.5, as identified in CVE-2026-27358 [1]. The vulnerability is classified as High severity with a CVSS v3 score of 7.1 (High), indicating moderate danger and potential for exploitation in mass campaigns [1].

Exploitation

Details

Exploitation requires user interaction, such as clicking a crafted link or visiting a specially prepared page [1]. An attacker with low privileges can initiate the attack, but successful execution depends on a privileged user action [1]. The reflected XSS nature means the malicious payload is immediately in the response, typically via a URL parameter or form input that is not sanitized before being rendered [1].

Impact

If exploited, an attacker can inject arbitrary HTML and JavaScript into the victim's browser session [1]. This could lead to redirects to malicious sites, display of unwanted advertisements, theft of session cookies, or other actions that compromise the integrity of the integrity of the website and its visitors [1]. The vulnerability is considered moderately dangerous and is expected to be used in automated attacks targeting thousands of sites [1].

Mitigation

The vendor has released version 3.9.5, which resolves the vulnerability [1]. Users are strongly advised to update immediately [1]. For those unable to update, Patchstack offers a mitigation rule to block attacks until the patch is applied [1]. No workarounds are mentioned in the advisory [1].