CVE-2026-25222

MEDIUM EPSS 33.1%
Published Feb 2, 20265mo ago · Modified Jun 17, 20262w ago
6.3 CVSS 4.0
Medium
Find Similar
Published Feb 2, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

Description

PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, a timing attack vulnerability in the sign-in process allows unauthenticated attackers to determine if a specific email address is registered on the platform. By measuring the response time of the login endpoint, an attacker can distinguish between valid and invalid email addresses. This occurs because the server only performs the computationally expensive Argon2 password hashing if the user exists in the database. Requests for existing users take significantly longer (~650ms) than requests for non-existent users (~160ms).

CVSS Details

Base Score
6.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
33.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure

Affected Products 1

VendorProductVersionRange
polarlearnpolarlearn*any

References 2

  • github.com https://github.com/polarnl/PolarLearn/commit/6c276855172c7310cce0df996cb47ffe0d886741
    Patch
  • github.com https://github.com/polarnl/PolarLearn/security/advisories/GHSA-wcr9-mvr9-4qh5
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/polarnl/PolarLearn/commit/6c276855172c7310cce0df996cb47ffe0d886741
    Patch