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5.4

Scoold login link can send users to a fake site

CVE-2026-55840 · published 20 days ago
Summary

The Scoold platform (versions before 1.69.1) could be tricked into sending users to a malicious web address after they sign in. An attacker can craft a login link that looks legitimate but redirects to their own site, potentially stealing credentials or tokens. Upgrade Scoold to version 1.69.1 or later to stop this behavior.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
erudika scoold < 1.69.1
Original advisory text
Scoold: Open Redirect in getBackToUrl() allows phishing via domain-prefix startsWith bypass
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.4 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-601Open Redirect
Timeline
Published15 Oct 2026
Updated4 Nov 2026
First seen15 Oct 2026
Sources
CVE-2026-55840 · NVD
CVE-2026-55840 · MITRE
CVE-2026-55840 · OSV
GHSA-85fm-6f2v-74pq · GHSA
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