CVE-2025-23870 identifies a security vulnerability in the wygk Copyright Safeguard Footer Notice plugin, specifically versions up to and including 3.0. The vulnerability is a Cross-Site Request Forgery (CSRF) flaw that enables attackers to perform unauthorized state-changing requests on behalf of authenticated users without their consent. This CSRF vulnerability is compounded by the presence of Stored Cross-Site Scripting (XSS), meaning that malicious scripts injected by an attacker can be permanently stored in the application’s data and executed in the context of users’ browsers. The combination of CSRF and Stored XSS significantly increases the attack surface, as CSRF can be used to inject malicious payloads that persist and affect multiple users. The plugin is typically used to display copyright notices in website footers, and its exploitation could allow attackers to manipulate website content, steal session cookies, or perform actions with the privileges of authenticated users. No CVSS score has been assigned yet, and no public exploits have been reported, but the vulnerability has been officially published and reserved in the CVE database. The lack of patches or mitigation guidance from the vendor increases the urgency for organizations to implement defensive measures. Given the nature of the vulnerability, attackers do not require user interaction beyond the victim visiting a malicious page, and no authentication bypass is needed since the attack leverages the victim’s authenticated session. This vulnerability affects websites using the vulnerable plugin, which is likely a subset of WordPress sites, given the plugin’s context.

The impact of CVE-2025-23870 is significant for organizations using the affected plugin. Successful exploitation can lead to persistent Stored XSS attacks, enabling attackers to execute arbitrary JavaScript in users’ browsers, potentially stealing session tokens, redirecting users to malicious sites, or performing unauthorized actions. The CSRF aspect allows attackers to trigger these injections without user consent, increasing the likelihood of compromise. This can result in data breaches, defacement, loss of user trust, and potential compliance violations. Since the vulnerability affects website footers, it may impact all visitors and users interacting with the site, broadening the scope of affected parties. Organizations relying on this plugin for copyright notices may face reputational damage and operational disruptions if exploited. The absence of known exploits in the wild currently limits immediate widespread impact, but the vulnerability’s nature makes it a prime target for attackers once exploit code becomes available. The threat is particularly relevant to organizations with high web traffic and those handling sensitive user data through affected websites.

To mitigate CVE-2025-23870, organizations should first identify if they are using the vulnerable versions (up to 3.0) of the wygk Copyright Safeguard Footer Notice plugin. If possible, disable or remove the plugin until a security patch is released. Monitor vendor communications and security advisories for updates or patches addressing this vulnerability. Implement Web Application Firewalls (WAFs) with rules to detect and block CSRF and XSS attack patterns, including unusual POST requests and script injections. Enforce strict Content Security Policy (CSP) headers to limit the execution of unauthorized scripts. Employ anti-CSRF tokens in web forms and verify their presence and validity server-side to prevent unauthorized requests. Conduct regular security audits and penetration testing focusing on CSRF and XSS vectors. Educate website administrators about the risks of installing unverified plugins and the importance of timely updates. Consider isolating or sandboxing untrusted plugins to limit their impact. Finally, monitor logs for suspicious activities that may indicate exploitation attempts.