CVE-2025-24764 identifies a DOM-based Cross-site Scripting (XSS) vulnerability in the (Simply) Guest Author Name plugin by A. Jones, affecting all versions up to and including 4.36. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows malicious scripts to be injected into the Document Object Model (DOM). This form of XSS is executed on the client side, typically when a victim user interacts with a crafted URL or input that the vulnerable plugin processes insecurely. The CVSS vector indicates network attack vector (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), user interaction (UI:R), with a scope change (S:C), and low impacts on confidentiality, integrity, and availability (C:L/I:L/A:L). This means an attacker with some level of authenticated access can craft inputs that, when viewed by other users, execute arbitrary JavaScript code in their browsers. Such attacks can lead to session hijacking, defacement, or redirection to malicious sites. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be considered exploitable. The plugin is commonly used in WordPress environments for managing guest author information, making websites using it potentially vulnerable to targeted attacks.

The impact of CVE-2025-24764 is significant for organizations using the (Simply) Guest Author Name plugin, especially those running WordPress sites with guest author features enabled. Successful exploitation can lead to theft of user credentials, session tokens, or other sensitive information, enabling further compromise of user accounts or administrative functions. It can also facilitate defacement or distribution of malware through injected scripts, damaging organizational reputation and user trust. The requirement for some privileges and user interaction limits mass exploitation but does not eliminate risk, particularly in environments with multiple authenticated users or where attackers can lure victims to malicious links. The scope change indicates that the vulnerability affects resources beyond the initially vulnerable component, potentially impacting other parts of the web application. Given the widespread use of WordPress and its plugins globally, this vulnerability could affect a broad range of industries, including media, e-commerce, education, and government websites.

To mitigate CVE-2025-24764, organizations should first check for updates or patches from the plugin vendor and apply them immediately once available. In the absence of an official patch, administrators should consider disabling or removing the (Simply) Guest Author Name plugin if it is not essential. Implementing Content Security Policy (CSP) headers can help restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. Input validation and output encoding should be reviewed and enhanced within the plugin's codebase if custom modifications are possible. Additionally, restricting plugin access to trusted users and minimizing privileges can reduce the attack surface. Monitoring web traffic and logs for suspicious activity related to script injection attempts is recommended. Educating users about the risks of clicking unknown links and encouraging the use of multi-factor authentication can further mitigate exploitation risks.