CVE-2025-58216 is a stored Cross-site Scripting (XSS) vulnerability identified in the WP Thumbtack Review Slider plugin developed by jgwhite33. This vulnerability arises from improper neutralization of input during web page generation, classified under CWE-79. Specifically, the plugin fails to adequately sanitize user-supplied data before rendering it on web pages, allowing malicious actors to inject and store arbitrary JavaScript code within the plugin's review slider content. When other users or administrators view the affected pages, the malicious script executes in their browsers. The vulnerability affects all versions of WP Thumbtack Review Slider up to and including version 2.6. The CVSS v3.1 base score is 5.9 (medium severity), with vector AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L, indicating that the attack can be performed remotely over the network with low attack complexity but requires high privileges and user interaction. The vulnerability impacts confidentiality, integrity, and availability to a limited extent, as the attacker can execute scripts in the context of the victim's browser, potentially leading to session hijacking, defacement, or other malicious actions. No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability's scope is changed (S:C), meaning it can affect resources beyond the initially vulnerable component, such as other parts of the website or user accounts.

For European organizations using WordPress websites with the WP Thumbtack Review Slider plugin, this vulnerability poses a moderate risk. Stored XSS can lead to unauthorized actions performed on behalf of legitimate users, including administrators, potentially compromising sensitive data or website integrity. This is particularly concerning for organizations handling personal data under GDPR, as exploitation could result in data breaches and regulatory penalties. Additionally, attackers could use the vulnerability to distribute malware or phishing content to site visitors, damaging brand reputation and trust. The requirement for high privileges to exploit somewhat limits the attack surface but does not eliminate risk, especially if administrative accounts are compromised or if multiple users have elevated permissions. The cross-site scripting can also facilitate lateral movement within the web application, increasing the potential impact. Given the widespread use of WordPress in Europe, organizations with public-facing websites relying on this plugin should consider the threat significant enough to warrant prompt attention.

1. Immediate mitigation involves removing or disabling the WP Thumbtack Review Slider plugin until a secure patch is available. 2. Restrict administrative privileges strictly to trusted personnel to reduce the risk of exploitation, as the vulnerability requires high privileges. 3. Implement Web Application Firewall (WAF) rules to detect and block suspicious input patterns related to script injection targeting the review slider endpoints. 4. Conduct a thorough audit of user-generated content within the plugin to identify and sanitize any existing malicious scripts. 5. Monitor website logs for unusual activities or error messages that could indicate attempted exploitation. 6. Educate administrators and content managers about the risks of XSS and safe content handling practices. 7. Once a patch is released, prioritize timely updates and verify the fix through testing. 8. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on affected web pages, mitigating the impact of potential XSS payloads.