CVE-2025-58806 is a high-severity Cross-Site Request Forgery (CSRF) vulnerability affecting the WordPress Error Monitoring plugin developed by imjoehaines and integrated with Bugsnag, specifically versions up to 1.6.3. This vulnerability allows an attacker to perform unauthorized actions on behalf of an authenticated user without their consent by exploiting the lack of proper CSRF protections in the plugin. The consequence of this CSRF flaw is the potential for Stored Cross-Site Scripting (XSS) attacks, where malicious scripts can be injected and persist within the plugin's stored data. This combination of CSRF leading to Stored XSS is particularly dangerous because it can enable attackers to execute arbitrary JavaScript in the context of the victim’s browser, potentially stealing session cookies, performing actions with the victim’s privileges, or spreading malware. The CVSS 3.1 base score of 7.1 reflects a high severity, with an attack vector that is network-based (AV:N), requiring no privileges (PR:N), but needing user interaction (UI:R). The scope is changed (S:C), indicating that the vulnerability affects resources beyond the initially vulnerable component. The impact on confidentiality, integrity, and availability is rated as low to low to low respectively, but the combined effect of CSRF and Stored XSS can lead to significant security breaches. No known exploits are currently reported in the wild, and no patches are linked yet, suggesting that organizations using this plugin should be vigilant and monitor for updates. The vulnerability is categorized under CWE-352, which specifically addresses CSRF issues, emphasizing the need for proper anti-CSRF tokens or similar protections in web applications.

For European organizations using WordPress with the Error Monitoring by Bugsnag plugin, this vulnerability poses a significant risk. Attackers could exploit the CSRF flaw to inject persistent malicious scripts, potentially compromising user sessions, stealing sensitive data, or manipulating site content. This is especially critical for organizations handling personal data under GDPR, as exploitation could lead to data breaches and regulatory penalties. The vulnerability could also undermine trust in corporate websites or portals, impacting brand reputation. Since WordPress is widely used across Europe for corporate, governmental, and e-commerce sites, the threat surface is broad. The requirement for user interaction means phishing or social engineering campaigns could be used to trick users into triggering the exploit. The changed scope (S:C) indicates that the vulnerability could affect multiple components or users beyond the initially targeted plugin, amplifying the potential damage. Although no known exploits are currently active, the high CVSS score and the nature of the vulnerability warrant proactive mitigation to prevent future attacks.

European organizations should immediately audit their WordPress installations to identify the presence of the vulnerable Error Monitoring by Bugsnag plugin. Until an official patch is released, organizations should consider disabling or uninstalling the plugin to eliminate the attack vector. Implementing Web Application Firewall (WAF) rules to detect and block CSRF attempts targeting the plugin’s endpoints can provide interim protection. Additionally, organizations should educate users about phishing and social engineering risks to reduce the likelihood of user interaction exploitation. Monitoring web server and application logs for unusual POST requests or suspicious activity related to the plugin can help detect attempted exploitation. Once a patch is available, prompt application of updates is critical. Developers should ensure that future versions of the plugin implement robust anti-CSRF tokens and sanitize all user inputs to prevent Stored XSS. Finally, organizations should conduct regular security assessments and penetration tests focusing on CSRF and XSS vulnerabilities in their WordPress environments.