---
id: CVE-2026-55840
title: Scoold is a Q&A and a knowledge sharing platform for teams
summary: >-
  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 again…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-601
vendor: Erudika
product: scoold
affected:
  - scoold < 1.69.1
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:40.957'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55840'
references:
  - url: >-
      https://github.com/Erudika/scoold/commit/9d61f6fe15d4f9f6262812ba7fea43be8d5bb745
    label: security-advisories@github.com
  - url: 'https://github.com/Erudika/scoold/releases/tag/1.69.1'
    label: security-advisories@github.com
  - url: 'https://github.com/Erudika/scoold/security/advisories/GHSA-85fm-6f2v-74pq'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
  - exploit-available
ingestedAt: '2026-10-15T19:25:46.435Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T20:15:05.964680Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.