CVE-2025-67259Public exploitNetwork attack vector

Authenticated course-data disclosure via HTTP method manipulation

Published Apr 24, 2026 · Updated Apr 24, 2026

Broken access control in ClassroomIO 0.1.13 allows remote authenticated users with student access to read unauthorized course data. Changing an authenticated request from POST to GET at /rest/v1/course causes the PostgREST backend to return expanded relational data without role filtering. A valid student token and course invitation are required; exposed data includes other students’ details, tutor and administrator profiles, group membership, and internal metadata.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in ClassroomIO 0.1.13 allows remote authenticated users with student access to read unauthorized course data. Changing an authenticated request from POST to GET at /rest/v1/course causes the PostgREST backend to return expanded relational data without role filtering. A valid student token and course invitation are required; exposed data includes other students’ details, tutor and administrator profiles, group membership, and internal metadata.

The record

CVE
CVE-2025-67259
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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