CVE-2026-41103: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft Microsoft Confluence SAML SSO plugin
Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-41103) affects the Microsoft Confluence SAML SSO plugin version 1.0.0. It is caused by an incorrect implementation of the authentication algorithm (CWE-303), which can be exploited remotely by an attacker to elevate privileges without authentication or user interaction. The vulnerability has a CVSS v3.1 base score of 9.1, reflecting its critical impact on confidentiality and integrity. Microsoft has published an official fix to remediate this issue, as detailed in their security advisory.
Potential Impact
Successful exploitation allows an unauthorized attacker to elevate privileges remotely over the network, potentially gaining high-level access to the affected system. This compromises confidentiality and integrity but does not affect availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users of the Microsoft Confluence SAML SSO plugin version 1.0.0 should apply the vendor-provided patch promptly. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103 for detailed remediation instructions.
CVE-2026-41103: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft Microsoft Confluence SAML SSO plugin
Description
Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-41103) affects the Microsoft Confluence SAML SSO plugin version 1.0.0. It is caused by an incorrect implementation of the authentication algorithm (CWE-303), which can be exploited remotely by an attacker to elevate privileges without authentication or user interaction. The vulnerability has a CVSS v3.1 base score of 9.1, reflecting its critical impact on confidentiality and integrity. Microsoft has published an official fix to remediate this issue, as detailed in their security advisory.
Potential Impact
Successful exploitation allows an unauthorized attacker to elevate privileges remotely over the network, potentially gaining high-level access to the affected system. This compromises confidentiality and integrity but does not affect availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users of the Microsoft Confluence SAML SSO plugin version 1.0.0 should apply the vendor-provided patch promptly. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103 for detailed remediation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-16T19:12:36.195Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103","vendor":"Microsoft"}]
Threat ID: 6a03655ecbff5d861008cb99
Added to database: 5/12/2026, 5:37:34 PM
Last enriched: 5/12/2026, 6:21:22 PM
Last updated: 5/13/2026, 5:03:05 AM
Views: 2
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