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CVE-2026-27506 sa2blv CVE debrief

CVE-2026-27506 is a stored cross-site scripting (XSS) vulnerability in SVXportal version 2.5 and prior. The vulnerability exists in the user profile update workflow, specifically in the user_settings.php file submitting to admin/update_user.php. An authenticated user can store malicious HTML/JavaScript in fields such as Firstname, lastname, email, and image_url. These fields are later rendered without adequate output encoding in the administrator interface (admin/users.php), resulting in JavaScript execution in an administrator's browser when the affected page is viewed.

Vendor
sa2blv
Product
SVXportal
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-02-20
Original CVE updated
2026-07-14
Advisory published
2026-02-20
Advisory updated
2026-07-14

Who should care

Administrators and users of SVXportal version 2.5 and prior should be aware of this vulnerability. As the vulnerability requires authenticated access, users with login credentials are at risk. Additionally, administrators who view the affected pages in the admin interface are also at risk of JavaScript execution in their browsers.

Technical summary

The vulnerability is caused by inadequate output encoding of user-supplied input in the user profile update workflow. Specifically, the user_settings.php file submitting to admin/update_user.php allows authenticated users to inject malicious HTML/JavaScript. This injected code is later rendered in the administrator interface (admin/users.php) without proper encoding, leading to JavaScript execution in an administrator's browser.

Defensive priority

Medium priority should be given to patching this vulnerability, as it requires authenticated access but can lead to JavaScript execution in an administrator's browser.

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability
  • Implement additional security measures such as input validation and output encoding
  • Monitor for suspicious activity and implement compensating controls
  • Consider implementing a web application firewall (WAF) to detect and prevent attacks
  • Conduct regular security audits and penetration testing to identify vulnerabilities

Evidence notes

The CVE record was published on 2026-02-20T17:25:57.410Z and was last modified on 2026-07-14T19:16:52.740Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 5.1 and a severity of MEDIUM.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-02-20T17:25:57.410Z and has not been modified since then. The NVD entry is currently Analyzed.