CVE-2025-26880 is a stored cross-site scripting (XSS) vulnerability identified in the sonalsinha21 SKT Skill Bar plugin, a WordPress plugin used to display skill bars on websites. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored persistently within the plugin's data fields. When a victim visits a page containing the injected script, the malicious code executes in their browser context, potentially leading to session hijacking, theft of cookies, defacement, or redirection to malicious sites. The affected versions include all releases up to and including version 2.3, with no patch currently available as per the provided data. Exploitation does not require authentication or user interaction beyond visiting the compromised page, increasing the risk profile. Although no known exploits are reported in the wild, the vulnerability is publicly disclosed and thus may attract attackers. The plugin is commonly used in WordPress sites, which have a broad global user base, making the attack surface significant. The lack of a CVSS score necessitates a severity assessment based on impact and exploitability factors.

The impact of CVE-2025-26880 is significant for organizations running websites that utilize the SKT Skill Bar plugin. Successful exploitation can compromise the confidentiality and integrity of user sessions by enabling attackers to steal cookies or authentication tokens, potentially leading to unauthorized access. It can also degrade availability indirectly by enabling defacement or malware distribution, which may damage organizational reputation and user trust. Since the vulnerability is stored XSS, the malicious payload persists and can affect multiple users over time. The ease of exploitation without authentication or complex prerequisites increases the likelihood of attacks, especially on high-traffic websites. Organizations in sectors such as e-commerce, finance, education, and government that rely on WordPress sites with this plugin are at heightened risk. Additionally, attackers may use this vulnerability as a foothold for further attacks within the network or to spread malware campaigns.

To mitigate CVE-2025-26880, organizations should prioritize updating the SKT Skill Bar plugin to a patched version once it becomes available from the vendor sonalsinha21. Until an official patch is released, administrators should implement strict input validation and output encoding on all user-supplied data fields related to the plugin to prevent script injection. Employing a Web Application Firewall (WAF) with rules to detect and block XSS payloads can provide interim protection. Regularly scanning websites for XSS vulnerabilities using automated tools and manual testing will help identify exploitation attempts. Additionally, applying Content Security Policy (CSP) headers can reduce the impact of injected scripts by restricting script execution sources. Educating site administrators and developers on secure coding practices and the risks of stored XSS is also recommended. Finally, monitoring logs for suspicious activity and user reports of unusual behavior can aid in early detection of exploitation.