🔐 CVE Alert

CVE-2026-31382

MEDIUM 6.1

Gainsight Assist reflected XSS/HTML injection

CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
2th

The error_description parameter is vulnerable to Reflected XSS. An attacker can bypass the domain's WAF using a Safari-specific onpagereveal payload.

CWE CWE-79
Vendor gainsight
Product gainsight assist
Published Mar 20, 2026
Last Updated Mar 23, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
Low

Affected Versions

Gainsight / Gainsight Assist
All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗
rapid7.com: https://www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assist-information-disclosure-xss-fixed/ communities.gainsight.com: https://communities.gainsight.com/community-news-2/recent-gainsight-assist-plugin-remediations-cve-2026-31381-and-cve-2026-31382-30587

Credits

Christopher O’Boyle, Cybersecurity Advisor at Rapid7