CVE-2026-55840 Details
Description
Scoold is a Q&A and a knowledge sharing platform for teams. Prior to 1.69.1, the getBackToUrl() method in src/main/java/com/erudika/scoold/utils/HttpUtils.java validates the backto and returnto parameters with Strings.CI.startsWith against the configured server URL. An attacker can supply an absolute URL whose hostname begins with the legitimate hostname, causing URI.resolve() to retain the attacker URL and the prefix check to accept it. A victim who follows the crafted sign-in link can be redirected to an attacker-controlled domain after authentication, enabling phishing and possible credential or token theft. This issue is fixed in version 1.69.1.
An open redirect vulnerability has been identified in Erudika Scoold versions prior to 1.69.1. The issue arises in the getBackToUrl() method, where the backto and returnto parameters are validated using a string prefix comparison against the server URL. This validation can be bypassed by supplying an absolute URL whose hostname begins with the legitimate server hostname. As a result, an attacker can manipulate the URL to redirect users to an attacker-controlled domain after authentication, potentially leading to phishing attacks and theft of credentials or tokens.
Users can update to Erudika Scoold version 1.69.1 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Erudika/scoold/security/advisories/GHSA-85fm-6f2v-74pq | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/Erudika/scoold/commit/9d61f6fe15d4f9f6262812ba7fea43be8d5bb745 | [email protected] | Source CodeVendor |
| https://github.com/Erudika/scoold/releases/tag/1.69.1 | [email protected] | Release NotesVendor |
| https://github.com/Erudika/scoold/security/advisories/GHSA-85fm-6f2v-74pq | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-601 | URL Redirection to Untrusted Site ('Open Redirect') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Erudika Scoold | <= 1.69.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 15, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |