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CVE-2026-25126
Good to know:
Date: January 29, 2026
PolarLearn is a free and open-source learning program. Prior to version 0-PRERELEASE-15, the vote API route ("POST /api/v1/forum/vote") trusts the JSON body’s "direction" value without runtime validation. TypeScript types are not enforced at runtime, so an attacker can send arbitrary strings (e.g., ""x"") as "direction". Downstream ("VoteServer") treats any non-""up"" and non-"null" value as a downvote and persists the invalid value in "votes_data". This can be exploited to bypass intended business logic. Version 0-PRERELEASE-15 fixes the vulnerability.
Severity Score
Severity Score
Weakness Type (CWE)
Improper Input Validation
CWE-20CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | LOW |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | LOW |
| Integrity (I): | HIGH |
| Availability (A): | NONE |