Gainsight Assist reflected XSS/HTML injection

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Summary

CVECVE-2026-31382
StatePUBLISHED
Assignerrapid7
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-20 14:16:14 UTC
Updated2026-04-16 15:02:38 UTC
DescriptionThe error_description parameter is vulnerable to Reflected XSS. An attacker can bypass the domain's WAF using a Safari-specific onpagereveal payload.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.000110000 probability, percentile 0.013750000 (date 2026-04-21)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1[email protected]Secondary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L
3.1CNACVSS6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gainsight Assist - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gainsight Gainsight Assist unknown semver Not specified

References

ReferenceSourceLinkTags
communities.gainsight.com/community-news-2/recent-gainsight-assist-plugin-remediations-... [email protected] communities.gainsight.com Vendor Advisory
www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assist-i... [email protected] www.rapid7.com Third Party Advisory, Exploit
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Christopher O’Boyle, Cybersecurity Advisor at Rapid7 (en)

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