CVE-2026-25126 | BDVDB-2026-313013 Detail

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.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-01-29Record published in the CVE List.
2. Version 22026-02-02Most recent update recorded in the CVE List.