CyberRota Analysis
AI-GeneratedAffected versions of MISP fail to properly enforce user authorization when instantiating event templates, allowing unauthorized users to access and utilize sharing groups and attach tags without appropriate permissions. This vulnerability can lead to unauthorized data exposure and unintended data propagation, making it critical for organizations using MISP versions 2.5.45 and earlier to prioritize remediation. Users managing sensitive information or relying on strict data sharing controls should address this issue promptly to mitigate potential security risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Affected versions of MISP do not consistently enforce the acting user's authorization when instantiating event templates. For templates using distribution = 4, the template can specify a sharing_group_id. The instantiation path passed that value into event creation without verifying that the user instantiating the template was actually permitted to use the selected sharing group. The commit notes that Event::_add() only performed its own sharing-group authorization in another code path, leaving template instantiation able to write the identifier directly. The same instantiation path also attached template-specified tags without checking the user's normal tagging permissions. In addition, it hardcoded local => 0, meaning tags marked local_only could be attached globally and consequently propagate through synchronization or export, contrary to their intended restriction. The fix adds explicit SharingGroup::canUse() authorization for the acting user, applies the same tag-modification checks used by normal event tagging, and ensures local_only tags are attached locally. Version affected: ≤2.5.45