CVE-2025-15377 is a medium-severity security vulnerability classified as CWE-352 (Cross-Site Request Forgery) found in the abage Sosh Share Buttons plugin for WordPress. This vulnerability exists in all plugin versions up to and including 1.1.0 due to the absence of nonce validation in the 'admin_page_content' function. Nonces in WordPress are security tokens used to verify that requests are intentional and originate from legitimate users. Without nonce validation, attackers can craft malicious web requests that, when executed by an authenticated administrator (via clicking a link or visiting a malicious page), cause unauthorized changes to the plugin's settings. The attack vector is network-based (remote) with no privileges required, but it requires user interaction from an administrator. The vulnerability impacts the integrity of the plugin's configuration but does not compromise confidentiality or availability. The CVSS v3.1 score of 4.3 reflects the ease of exploitation (low complexity), no privileges required, but requiring user interaction and limited impact scope. No patches or official fixes are currently linked, and no known exploits have been observed in the wild. The vulnerability is significant because it allows attackers to manipulate plugin settings stealthily, potentially enabling further attacks or misconfigurations.

The primary impact of CVE-2025-15377 is the unauthorized modification of the Sosh Share Buttons plugin settings by attackers without authentication, leveraging CSRF attacks against site administrators. This compromises the integrity of the plugin's configuration, which could lead to altered sharing behaviors, injection of malicious content, or enabling other attack vectors if the plugin settings control critical functionality. Although confidentiality and availability are not directly affected, the integrity breach can facilitate further exploitation or damage site reputation. Organizations relying on this plugin may face risks of unauthorized content manipulation or loss of control over social sharing features. Since exploitation requires administrator interaction, the attack surface is limited but still significant in environments with multiple administrators or where phishing attacks are feasible. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits post-disclosure.

1. Immediate mitigation involves updating the Sosh Share Buttons plugin to a version that includes nonce validation once an official patch is released by the vendor. 2. Until a patch is available, administrators should avoid clicking on untrusted links or visiting suspicious websites while logged into WordPress admin. 3. Implement web application firewall (WAF) rules to detect and block suspicious POST requests targeting the plugin's admin endpoints. 4. Employ security plugins that add CSRF protections or monitor for unauthorized changes in plugin settings. 5. Educate administrators about phishing and social engineering risks to reduce the likelihood of interaction with malicious content. 6. Regularly audit plugin configurations and WordPress logs for unexpected changes. 7. Consider restricting administrative access by IP or using multi-factor authentication to reduce the risk of successful CSRF exploitation. 8. Monitor security advisories from the plugin vendor and WordPress community for updates or patches.