CVE-2026-31381
Gainsight Assist plugin information disclosure
Description
An attacker can extract user email addresses (PII) exposed in base64 encoding via the state parameter in the OAuth callback URL.
INFO
Published Date :
March 20, 2026, 2:16 p.m.
Last Modified :
April 16, 2026, 3:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 9974b330-7714-4307-a722-5648477acda7 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Sanitize state parameter in OAuth callback.
- Avoid encoding PII in state parameter.
- Implement proper input validation.
- Review OAuth implementation.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-31381.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-31381 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-31381
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-31381 vulnerability anywhere in the article.
-
The Hacker News
⚡ Weekly Recap: CI/CD Backdoor, FBI Buys Location Data, WhatsApp Ditches Numbers & More
Another week, another reminder that the internet is still a mess. Systems people thought were secure are being broken in simple ways, showing many still ignore basic advisories. This edition covers a ... Read more
The following table lists the changes that have been made to the
CVE-2026-31381 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 16, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:gainsight:assist:-:*:*:*:*:*:*:* Added Reference Type Rapid7, Inc.: http://www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assist-information-disclosure-xss-fixed Types: Third Party Advisory Added Reference Type Rapid7, Inc.: https://communities.gainsight.com/community-news-2/recent-gainsight-assist-plugin-remediations-cve-2026-31381-and-cve-2026-31382-30587 Types: Vendor Advisory -
CVE Modified by [email protected]
Mar. 23, 2026
Action Type Old Value New Value Added Reference https://communities.gainsight.com/community-news-2/recent-gainsight-assist-plugin-remediations-cve-2026-31381-and-cve-2026-31382-30587 -
New CVE Received by [email protected]
Mar. 20, 2026
Action Type Old Value New Value Added Description An attacker can extract user email addresses (PII) exposed in base64 encoding via the state parameter in the OAuth callback URL. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-598 Added Reference http://www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assist-information-disclosure-xss-fixed