User impersonation via regex-based certificate CN extraction
Published Sep 15, 2025 · Updated Sep 15, 2025
Authentication bypass in Ignite Realtime Openfire before 5.0.2 allows remote authenticated users to impersonate another user. CNCertificateIdentityMapping applies a CN regex to provider-dependent getSubjectDN().getName() output, so CN= embedded in another attribute is accepted. Exploitation requires SASL EXTERNAL with CN-to-account mapping and a crafted certificate from a trusted private CA; the attacker gains the victim's XMPP identity.
Summary
What happened
Authentication bypass in Ignite Realtime Openfire before 5.0.2 allows remote authenticated users to impersonate another user. CNCertificateIdentityMapping applies a CN regex to provider-dependent getSubjectDN().getName() output, so CN= embedded in another attribute is accepted. Exploitation requires SASL EXTERNAL with CN-to-account mapping and a crafted certificate from a trusted private CA; the attacker gains the victim's XMPP identity.
The record
- CVE
- CVE-2025-59154
- Published
- Sep 15, 2025
- Updated
- Sep 15, 2025
- Vendor
- Ignite Realtime
- Product
- Openfire
- Classifications
- CWE-290, T1078
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 15, 2025CVE publishedPublication date reported by the CVE source.
- Sep 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 5.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
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Your stack
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