CVE-2026-50054: CWE-269 Improper Privilege Management in Zimbra Zimbra Collaboration Suite
Description
An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.
CVSS v3.1
Score 7.1high
Affected software
Zimbra
Zimbra Collaboration Suite
pkg:github/zimbra/zimbra-collaboration-suiteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-269) in Zimbra Collaboration Suite's GrantRightsRequest functionality permits an attacker with an authenticated account to escalate privileges by granting another local account the loginAs right. This improper privilege management flaw results in persistent unauthorized mailbox access and the ability to send mail as the compromised user, even after password resets or session terminations. The issue affects all versions before 10.1.20.
Potential Impact
An attacker with valid credentials can grant persistent mailbox access and mail-sending authority to another local account. This access survives password changes and session expiry, potentially allowing long-term unauthorized access and misuse of mailbox functions. The confidentiality of mailbox contents is at high risk, while integrity is impacted to a lesser extent. Availability is not affected.
Mitigation Recommendations
A fix is available in Zimbra Collaboration Suite version 10.1.20. Users should upgrade to this version or later to remediate the vulnerability. No other mitigation guidance is provided or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- rapid7
- Date Reserved
- 2026-06-03T09:35:31.591Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac7cab82cdf04f6562ac216
Added to database: 10/08/2026, 16:54:16 UTC
Last enriched: 10/08/2026, 17:03:16 UTC
Last updated: 10/08/2026, 21:45:59 UTC
Views: 8
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