CVE-2026-34736CWE-287

Open edX Platform: Account Activation Bypass via activation_key Exposure in REST API

Medium · published April 2, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
27.7
In the wild
Unconfirmed
What it is

Open edX Platform enables the authoring and delivery of online learning at any scale. From the maple release to before the ulmo release, an unauthenticated attacker can fully bypass the email verification process by combining two issues: the OAuth2 password grant issuing tokens to inactive users (documented behavior) and the activation_key being exposed in the REST API response at /api/user/v1/accounts/. This issue has been patched in the ulmo release.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00353 · 27.7th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-04-02T18:29Z
EPSS history
Timeline
  • 02 APR 18:29Z
    Open edX Platform: Account Activation Bypass via activation_key Exposure in REST API
    cvelistv5