Bug 2571793 (CVE-2026-107247)

Summary: CVE-2026-107247 revive-adserver: revive-adserver: Authorization bypass via parameter precedence inconsistency
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in revive-adserver. An authorization bypass allows an authenticated remote user to access or modify resources belonging to other agencies. Due to global input registration prioritizing URL query parameters over form body parameters, an attacker can submit permitted identifiers in the query string while targeting different resources in the request body. This enables the attacker to perform unauthorized cross-agency modifications and access restricted campaign and banner data.
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Description OSIDB Bzimport 2026-11-11 17:41:50 UTC 
An authorization bypass in Revive Adserver 6.0.0 through 6.0.8 allows an authenticated manager restricted to one agency to access or modify resources belonging to another agency. Global input registration gives GET parameters precedence over POST parameters, while submitted administration forms use POST values. By supplying authorized object identifiers in the query string and different identifiers in the POST body, an attacker can cause permission checks and subsequent operations to target different objects. This permits unauthorized cross-agency changes, campaign ownership reassignment and disclosure of campaign and banner data. The regression was introduced in commit 156dee7bc3283c128f35e5a31bb305054cc8de1b and is fixed in Revive Adserver 6.0.9 by restoring POST precedence in global input registration.