CVE-2025-57883
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
Reflected cross-site scripting vulnerability in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a crafted page or URL, an arbitrary script may be executed in the user's browser.
Risk Assessment
An attacker could steal user data, hijack sessions, or perform other malicious actions in the context of the victim's browser.
Recommendation
Update GroupSession to the latest available version that includes the fix.
Other vulnerabilities in GroupSession
See all- CVE-2025-64781Medium
GroupSession Free edition, byCloud, and ZION before version 5.7.1 have the "External page display restriction" set to "Do not limit" in the initial configuration. With this configuration, the user may be redirected to an arbitrary website when accessing a specially crafted URL.
- CVE-2025-54407Medium
Stored cross-site scripting vulnerability in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a crafted page or URL, an arbitrary script may be executed in the user's browser.
Original NVD description (English source)
Reflected cross-site scripting vulnerability exists in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a crafted page or URL, an arbitrary script may be executed on the web browser of the user.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS