Security readout for executives and security teams
Plain-English summary
A flaw in Microsoft’s SAML SSO plugins for Jira and Confluence can let an unauthenticated network attacker gain elevated privileges. Successful exploitation could expose or alter sensitive business data, although the supplied CVSS assessment indicates no direct availability impact.
Executive priority
Treat this as an urgent remediation item because compromise requires no existing account or user action and could expose or alter sensitive data. Prioritize internet-accessible and business-critical Jira or Confluence systems, while avoiding claims of active exploitation without additional evidence.
Technical view
CVE-2026-41103 is a CWE-303 authentication-algorithm implementation flaw affecting listed version 1.0.0 of Microsoft’s Jira and Confluence SAML SSO plugins. It is remotely reachable, requires no privileges or user interaction, and has a CVSS 3.1 score of 9.1, with high confidentiality and integrity impact.
Likely exposure
Exposure is most likely where Jira or Confluence uses the listed Microsoft SAML SSO plugin version 1.0.0 and attackers can reach its authentication interface. The supplied sources do not identify other affected versions or deployment prerequisites.
Exploitation context
The vulnerability is not listed in the supplied KEV data, and no cited source confirms active exploitation. The CVSS vector nevertheless indicates low-complexity, unauthenticated network exploitation without user interaction. Public exploit availability is not established by the supplied evidence.
Researcher notes
The source bundle identifies CWE-303 and CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. It does not describe the faulty authentication logic, affected configurations, patched version, indicators of compromise, exploit availability, or confirmed attacks. Those details require Microsoft’s current advisory.
Mitigation direction
- Inventory Jira and Confluence deployments for the affected Microsoft SAML SSO plugins and version 1.0.0.
- Review Microsoft’s advisory for the exact patched version or vendor mitigation; the bundle does not specify it.
- Apply Microsoft’s remediation promptly using normal change-control and rollback procedures.
- Restrict unnecessary network access to affected authentication interfaces until remediation is verified.
- Monitor authentication and privilege changes for suspicious activity.
Validation and detection
- Confirm installed plugin names and versions across every Jira and Confluence instance.
- Verify affected version 1.0.0 is removed or remediated according to Microsoft guidance.
- Test legitimate SAML authentication and authorization after remediation.
- Review logs for unexpected successful logins, privilege grants, or administrative actions.
- Re-scan inventories to ensure no affected instances remain.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-303: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-41103 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C3.95.2microsoftVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft SSO Plugin for Jira & Confluence Elevation of Privilege VulnerabilityCVE reference, microsoft · vendor-advisory, patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Implementation of Authentication Algorithm
Incorrect Implementation of Authentication Algorithm represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.