What is CVE-2026-31382?

CVE-2026-31382 is a medium-severity vulnerability in Gainsight Assist, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-20.

How severe is CVE-2026-31382?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Gainsight Assist

CVE-2026-31382

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

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (18.8th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Gainsight Assist
Gainsight Assist — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assist-info… (Exploit, Third Party Advisory, third-party-advisory)
communities.gainsight.com/community-news-2/recent-gainsight-assist-plugin-remed… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-31382?: CVE-2026-31382 is a medium-severity vulnerability in Gainsight Assist, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-20.
How severe is CVE-2026-31382?: Medium severity. CVSS v3 base score is 6.1 out of 10.