CVE-2026-31382 Details
Description
The error_description parameter is vulnerable to Reflected XSS. An attacker can bypass the domain's WAF using a Safari-specific onpagereveal payload.
A reflected cross-site scripting vulnerability has been identified in the Gainsight Assist plugin, specifically within the error_description parameter of the OAuth callback URL. This vulnerability allows an attacker to inject malicious HTML, which can be executed automatically in the victim's browser, particularly in Safari. The injection can bypass the domain's Web Application Firewall (WAF) and lead to client-side exploitation, such as resource exhaustion or malware delivery.
Gainsight has implemented a server-side code-level fix for this vulnerability as of March 6, 2026. Users should ensure they are using the latest version of the Gainsight Assist plugin.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 20, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| gainsight assist | All versions |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 16, 2026 | Initial Analysis | [email protected] |
| Mar 23, 2026 | CVE Modified | [email protected] |
| Mar 20, 2026 | New CVE Received | [email protected] |