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.
Metrics
Affected Vendors & Products
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Advisories
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Fixes
Solution
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Workaround
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References
History
Fri, 30 Jan 2026 07:15:00 +0900
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | PolarLearn's unvalidated vote direction allows vote count manipulation | |
| Weaknesses | CWE-20 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-01-29T22:06:37.224Z
Reserved: 2026-01-29T14:03:42.540Z
Link: CVE-2026-25126
Vulnrichment
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NVD
Status : Received
Published: 2026-01-29T22:15:56.423
Modified: 2026-01-29T22:15:56.423
Link: CVE-2026-25126
Redhat
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OpenCVE Enrichment
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Weaknesses