CVE-2025-15377 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the abage Sosh Share Buttons plugin for WordPress, affecting all versions up to and including 1.1.0. The vulnerability stems from the absence of nonce validation in the 'admin_page_content' function, which is responsible for handling administrative actions related to the plugin's settings. Nonce validation is a security mechanism used in WordPress to ensure that requests are intentional and originate from legitimate users. Without this protection, attackers can craft malicious requests that, when executed by an authenticated administrator (e.g., by clicking a link), can alter the plugin's settings without the administrator's consent. The attack vector is remote and requires no prior authentication, but it does require user interaction, such as clicking a specially crafted link. The vulnerability impacts the integrity of the plugin's configuration but does not expose confidential data or affect system availability. The CVSS v3.1 base score is 4.3 (medium), reflecting the ease of exploitation combined with limited impact scope. No patches or exploits are currently reported, but the vulnerability's presence in a widely used WordPress plugin makes it a potential target for attackers leveraging social engineering techniques.

For European organizations, this vulnerability poses a risk primarily to the integrity of WordPress sites using the abage Sosh Share Buttons plugin. An attacker exploiting this flaw could modify plugin settings, potentially enabling further malicious activities such as injecting malicious scripts, redirecting users, or disabling security features. While the vulnerability does not directly compromise confidentiality or availability, altered plugin behavior could indirectly facilitate phishing, malware distribution, or reputation damage. Organizations with public-facing WordPress sites, especially those relying on social sharing features, may face increased risk of targeted attacks. The requirement for administrator interaction means that organizations with less security-aware staff or insufficient training are more vulnerable. Additionally, the lack of a patch at the time of disclosure increases the window of exposure. Given the widespread use of WordPress across Europe, the vulnerability could affect a broad range of sectors, including e-commerce, media, and government websites.

Immediate mitigation should focus on minimizing administrator exposure to phishing and social engineering attacks by conducting targeted security awareness training emphasizing the risks of clicking unsolicited links. Administrators should be advised to verify the legitimacy of URLs before interacting with them. Until a patch is released, organizations can implement web application firewall (WAF) rules to detect and block suspicious POST requests targeting the plugin's administrative endpoints. Additionally, restricting administrative access to trusted IP addresses or VPNs can reduce the attack surface. Monitoring WordPress logs for unusual changes in plugin settings or unexpected administrative actions can help detect exploitation attempts early. Once available, promptly apply official patches or updates from the plugin vendor. Developers maintaining WordPress sites should consider adding nonce validation manually as an interim fix if feasible. Regular backups of WordPress configurations and databases will aid in recovery if unauthorized changes occur.