CVE-2026-25126

HIGH

7.1

Description

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.

CVE Details

CVSS v3.1 Score7.1

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published1/29/2026

Last Modified2/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

polarlearn:polarlearn

Weaknesses (CWE)

CWE-20

References

https://github.com/polarnl/PolarLearn/commit/e6227d94d0e53e854f6a46480db8cd1051184d41(security-advisories@github.com)

https://github.com/polarnl/PolarLearn/security/advisories/GHSA-ghpx-5w2p-p3qp(security-advisories@github.com)

IOC Correlations

No correlations recorded

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