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CVE

CVE-2026-25126

PolarLearn's unvalidated vote direction allows vote count manipulation
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CVE

CVE-2026-25126

PolarLearn's unvalidated vote direction allows vote count manipulation

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25126.json, https://github.com/polarnl/PolarLearn/commit/e6227d94d0e53e854f6a46480db8cd1051184d41, https://github.com/polarnl/PolarLearn/security/advisories/GHSA-ghpx-5w2p-p3qp, https://nvd.nist.gov/vuln/detail/CVE-2026-25126

Severity

7.1

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.1
EPSS Probability
0.0002%
EPSS Percentile
0.0495%
Introduced Version
0
Fix Available
e6227d94d0e53e854f6a46480db8cd1051184d41

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