CVE Catalog

CVE-2026-96535

MediumCVSS 5.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.23%

13th percentile - higher than 13% of all known CVEs

Summary

Cross-Site Scripting on the YouMind portal, specifically in the avatar update endpoint, when setting a profile picture via an arbitrary URL. This occurs due to a lack of sanitisation and validation of SVG content when setting an SVG image containing embedded JavaScript code as the avatar. The file is served by the CDN with Content-Type: image/svg+xml and, when navigating directly to that URL, the script executes within the context of the CDN's domain.

Risk Assessment

An attacker can execute arbitrary JavaScript in the context of the CDN domain, potentially leading to session theft, cookie theft, or other actions on behalf of the user. The vulnerability is particularly dangerous because it affects a trusted CDN domain.

Recommendation

Implement sanitisation and validation of SVG content before saving the avatar, and consider serving SVG files with Content-Disposition: attachment or a restrictive CSP. Update the YouMind portal once a fix is available.

Related vulnerabilities

Original NVD description (English source)

Cross-Site Scripting on the YouMind portal, specifically in the avatar update endpoint, when setting a profile picture via an arbitrary URL. This occurs due to a lack of sanitisation and validation of SVG content when setting an SVG image containing embedded JavaScript code as the avatar. The file is served by the CDN with Content-Type: image/svg+xml and, when navigating directly to that URL, the script executes within the context of the CDN’s domain.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS