CVE-2026-125372
Deferred Deferred - Pending Action

Authorization Bypass in REBUILD FeedsListController

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: VulnCheck

Description
REBUILD before 4.5.3 contains an authorization bypass vulnerability in FeedsListController fetchDetails and fetchComments that skips privilege filtering and FeedsHelper.checkReadable checks. Authenticated attackers can enumerate sequential IDs via the feeds-details and comments-list endpoints to read private or team-scoped feed content, images, attachments and comments.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-125372
EUVD
EUVD-2026-120535

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
getrebuild rebuild From 0 (inc) to 4.5.3 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

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Executive Summary

This vulnerability is an authorization bypass in REBUILD versions before 4.5.3. It affects the FeedsListController component, specifically the fetchDetails and fetchComments endpoints. Authenticated attackers can skip privilege checks and enumerate sequential IDs via the feeds-details and comments-list endpoints to access private or team-scoped feed content, images, attachments, and comments.

Detection Guidance

To detect this vulnerability, check if your REBUILD instance is running a version before 4.5.3. Use commands like 'curl -s http://your-rebuild-server/feeds-details?id=1' or 'curl -s http://your-rebuild-server/comments-list?id=1' to test if private content is accessible without proper authorization.

Impact Analysis

If you use REBUILD before version 4.5.3, an attacker with valid credentials could exploit this flaw to read sensitive information such as private team feeds, comments, images, and attachments that they should not have access to. This could lead to data leaks or unauthorized information disclosure.

Compliance Impact

This vulnerability could violate compliance requirements under GDPR and HIPAA by allowing unauthorized access to sensitive personal or health-related data stored in private feeds. Unauthorized disclosure of such data may result in legal penalties, regulatory fines, and reputational damage.

Mitigation Strategies

Upgrade REBUILD to version 4.5.3 or later immediately. If upgrading is not possible, restrict access to the /feeds-details and /comments-list endpoints via network controls or firewall rules until patched.

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