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.
History

Fri, 20 Feb 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Polarlearn
Polarlearn polarlearn
CPEs cpe:2.3:a:plarnl:polarlearn:-:*:*:*:*:*:*:* cpe:2.3:a:polarlearn:polarlearn:-:*:*:*:*:*:*:*
Vendors & Products Plarnl
Plarnl polarlearn
Polarlearn
Polarlearn polarlearn

Fri, 20 Feb 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Plarnl
Plarnl polarlearn
CPEs cpe:2.3:a:plarnl:polarlearn:-:*:*:*:*:*:*:*
Vendors & Products Plarnl
Plarnl polarlearn

Mon, 02 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 30 Jan 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Polarnl
Polarnl polarlearn
Vendors & Products Polarnl
Polarnl polarlearn

Thu, 29 Jan 2026 22:15:00 +0000

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
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-01-29T22:06:37.224Z

Updated: 2026-02-02T16:34:07.949Z

Reserved: 2026-01-29T14:03:42.540Z

Link: CVE-2026-25126

cve-icon Vulnrichment

Updated: 2026-01-30T14:37:07.311Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-29T22:15:56.423

Modified: 2026-02-20T20:46:35.787

Link: CVE-2026-25126

cve-icon Redhat

No data.