CVE-2025-26950 is a security vulnerability classified as a stored cross-site scripting (XSS) flaw in the AddonsPress Nepali Date Converter plugin, affecting all versions up to and including 2.0.8. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows attackers to inject malicious JavaScript code that is stored persistently on the server. When other users access the affected pages, the malicious script executes in their browsers within the context of the vulnerable site. This can lead to a range of attacks such as session hijacking, theft of sensitive information, defacement, or redirecting users to malicious websites. The plugin is used to convert dates into the Nepali calendar format, and its user base is primarily Nepali-speaking websites and communities. No authentication or special privileges are required to exploit this vulnerability, and no user interaction beyond visiting the compromised page is necessary. Although no public exploits have been reported yet, the vulnerability poses a significant risk due to the stored nature of the XSS, which can affect any visitor to the compromised site. The lack of a CVSS score indicates that the vulnerability is newly disclosed and pending further assessment. The vulnerability was reserved in February 2025 and published in April 2025, with no patches currently linked, suggesting that users should apply manual mitigations or monitor for updates from the vendor.

The impact of CVE-2025-26950 is potentially severe for organizations using the AddonsPress Nepali Date Converter plugin. Stored XSS vulnerabilities allow attackers to execute arbitrary scripts in the browsers of users visiting the affected site, compromising confidentiality by stealing cookies, session tokens, or other sensitive data. Integrity can be affected through content manipulation or defacement, while availability might be indirectly impacted if attackers deploy disruptive scripts or phishing pages. Since exploitation requires no authentication and no user interaction beyond page visit, the attack surface is broad, potentially affecting all visitors. Organizations operating Nepali language websites, government portals, educational institutions, and e-commerce platforms using this plugin are at risk. The vulnerability could be leveraged for targeted attacks against Nepali-speaking user bases or for widespread exploitation if automated attacks emerge. The absence of known exploits in the wild currently limits immediate risk but does not diminish the urgency for mitigation. Failure to address this vulnerability could result in reputational damage, data breaches, and regulatory consequences, especially in regions with strict data protection laws.

To mitigate CVE-2025-26950, organizations should first check for updates or patches from AddonsPress and apply them promptly once available. In the absence of official patches, administrators should implement strict input validation and sanitization on all user-supplied data processed by the Nepali Date Converter plugin. Employing output encoding techniques, such as HTML entity encoding, can prevent malicious scripts from executing when rendered in browsers. Web application firewalls (WAFs) can be configured to detect and block typical XSS payloads targeting this plugin. Additionally, restricting plugin usage to trusted users or disabling it temporarily can reduce exposure. Conducting regular security audits and penetration testing focused on XSS vulnerabilities will help identify residual risks. Educating site administrators and developers about secure coding practices and the risks of stored XSS is also critical. Finally, monitoring web traffic and logs for suspicious activity related to the plugin can provide early detection of exploitation attempts.