CVE-2025-52727 Overview
CVE-2025-52727 is a reflected Cross-Site Scripting (XSS) vulnerability affecting the QuanticaLabs CSS3 Vertical Web Pricing Tables WordPress plugin. The flaw stems from improper neutralization of user-controlled input during web page generation [CWE-79]. Attackers can craft a malicious URL that, when clicked by an authenticated or unauthenticated user, executes arbitrary JavaScript in the victim's browser within the context of the vulnerable site. All plugin versions up to and including 1.9 are affected. The issue was published to the National Vulnerability Database (NVD) on June 27, 2025.
Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in a victim's browser session, potentially leading to session hijacking, credential theft, or redirection to attacker-controlled sites.
Affected Products
- QuanticaLabs CSS3 Vertical Web Pricing Tables WordPress plugin, versions through 1.9
- WordPress sites running the vulnerable plugin
- End-user browsers loading content from affected sites
Discovery Timeline
- 2025-06-27 - CVE-2025-52727 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-52727
Vulnerability Analysis
The vulnerability is a reflected XSS issue in the QuanticaLabs CSS3 Vertical Web Pricing Tables plugin for WordPress. Reflected XSS occurs when an application accepts input from an HTTP request and echoes it back into the response without proper output encoding or input validation. The plugin fails to neutralize special characters such as <, >, and quotation marks before rendering user-supplied data in the HTML response.
Exploitation requires user interaction, typically tricking a victim into clicking a crafted link. Once executed, the injected script runs in the origin of the vulnerable WordPress site. Attackers can use this to steal session cookies, perform actions on behalf of administrators, or deliver further client-side payloads. The scope-changed CVSS metric indicates the impact extends beyond the vulnerable component to the user's browser context.
Root Cause
The root cause is the absence of proper output encoding when reflecting user-controlled request parameters into the page response. The plugin does not apply WordPress sanitization helpers such as esc_html(), esc_attr(), or wp_kses() to data before embedding it in HTML, allowing injected markup and script tags to render in the browser.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker crafts a URL containing JavaScript payload parameters that the plugin reflects into the rendered page. When a victim visits the link, the malicious script executes in the context of the WordPress site, where it can read cookies accessible to scripts, manipulate the DOM, or initiate authenticated requests. No prior authentication is required for the attacker to craft the payload.
No verified proof-of-concept code is available. See the Patchstack WordPress Vulnerability advisory for additional technical context.
Detection Methods for CVE-2025-52727
Indicators of Compromise
- HTTP request logs containing URL parameters with encoded or raw <script>, onerror=, onload=, or javascript: strings targeting plugin endpoints.
- Unexpected outbound requests from user browsers to attacker-controlled domains shortly after visiting WordPress pages.
- Anomalous administrator account activity, including unexpected content changes or new user creation following clicks on suspicious links.
Detection Strategies
- Inspect web server access logs for query strings referencing the css3_vertical_web_pricing_tables plugin paths combined with HTML or JavaScript control characters.
- Deploy a Web Application Firewall (WAF) with rulesets that match common reflected XSS payload patterns in GET and POST parameters.
- Use browser-side Content Security Policy (CSP) violation reports to identify attempts to load inline or external scripts from unexpected sources.
Monitoring Recommendations
- Continuously monitor WordPress plugin inventories and cross-reference versions against the Patchstack vulnerability database.
- Alert on access patterns where a single source IP requests plugin URLs with high entropy or encoded payloads in parameters.
- Track referrer headers and user-agent patterns that suggest phishing campaigns delivering crafted links to site users.
How to Mitigate CVE-2025-52727
Immediate Actions Required
- Identify all WordPress installations using the CSS3 Vertical Web Pricing Tables plugin and confirm the installed version.
- Deactivate and remove the plugin from any site running version 1.9 or earlier until a patched release is verified.
- Review administrator and editor account activity for signs of session compromise and rotate credentials where suspicious activity is found.
Patch Information
At the time of NVD publication, the vulnerability affects all versions through 1.9 with no fixed version listed in the advisory. Site administrators should monitor the Patchstack advisory page and the vendor's distribution channels for an updated release.
Workarounds
- Remove or disable the plugin until a patched version is released by QuanticaLabs.
- Deploy WAF rules to block requests containing common XSS payload signatures targeting plugin parameters.
- Implement a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
- Educate administrators and editors about the risk of clicking unsolicited links pointing to the WordPress site.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
