CVE-2023-22515 is a broken access control vulnerability in Atlassian Confluence Data Center and Server. CISA added it to the Known Exploited Vulnerabilities catalogue on 5 October 2023, which means attackers have used it in real attacks. Organisations running the affected product should apply the vendor fix or mitigation as a priority.
What broken access control means in Confluence
Broken access control in Confluence means the product fails to enforce who can reach, change, or act on content and administrative functions. In practice, that can let an unauthorised user reach data or functions they should never see, or extend their access beyond intended boundaries.
This matters because collaboration platforms often hold highly sensitive internal material, including incident details, customer information, source links, and operational records. When access checks fail, the issue is not just confidentiality, it can also affect integrity, auditability, and trust in the platform’s permission model.
Why this vulnerability is dangerous in an enterprise wiki
Confluence is a central knowledge and workflow system, so a single access-control flaw can have broad blast radius. Attackers do not need malware to create impact if they can use the application’s own trust relationships to view restricted pages, alter content, or pivot into adjacent systems that rely on shared sign-on and workflow access.
For that reason, broken access control is one of the most consequential web application failure modes. OWASP ASVS and OWASP Top 10 Guide both treat authorisation failures as core application-security concerns, not edge cases.
Where a bug like this is actively exploited, the practical concern is often not only page disclosure. Attackers may chain it with session abuse, privileged workspace access, or content tampering to create longer-lived footholds and more convincing follow-on abuse.
How organisations assess exposure and confirm priority
The first step is to confirm whether Confluence Data Center or Server is present anywhere in the asset estate, including internet-facing instances, test systems, and neglected legacy deployments. Exposure assessment should be based on inventory, externally reachable services, and vendor guidance for the exact product family.
Because this CVE was added to CISA’s Known Exploited Vulnerabilities catalogue, it should be treated as an exploitation-priority issue rather than a routine backlog item. The authoritative record for the vulnerability is the CVE Program, while the NIST National Vulnerability Database is the normal reference point for CVE metadata and product detail.
For operational prioritisation, organisations should also check their vulnerability management process against the Vulnerability Management Guide, especially where internet exposure and business-critical collaboration systems compete for remediation capacity.
Remediation, detection, and post-incident review
Preferred remediation is the vendor fix or mitigation referenced in Atlassian and CISA guidance, applied as soon as operationally possible. If patching is delayed, compensating controls should reduce exposure by limiting network reachability, tightening administrative access, and reviewing whether the platform is reachable from untrusted zones.
Detection should focus on unusual requests, unexpected permission changes, newly created content or administrative actions, and signs that the instance was accessed outside normal user and service patterns. If exploitation is suspected, review related authentication events, page history, admin activity, and connected integrations for signs of lateral movement or persistence.
After patching, do not assume the environment is clean. Review whether any accounts, sessions, API tokens, or integration credentials exposed through the instance should be rotated or reissued, especially if the platform was used as a trusted hub for broader enterprise access.
Risk and Threat Considerations
This CVE is dangerous because it gives attackers a direct path to abuse the application’s own authorisation logic. In a collaboration platform, that can expose sensitive content at scale and create secondary risk if the compromised instance is trusted by other internal tools or identity-linked workflows.
Failure mechanism: An access-control check fails to distinguish authorised from unauthorised requests, so the attacker can reach resources or functions that should remain blocked.
Impact: Confidential pages may be disclosed, content may be altered, and the instance can become a launch point for broader compromise if the attacker uses it to gather credentials, sessions, or operational intelligence.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP ASVS, CIS Controls v8 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP ASVS | V8 — Authorization | Broken access control is an authorisation failure in the application layer. |
| V16 — Security Logging and Error Handling | Detection and review rely on logs that reveal unusual access or privilege abuse. | |
| Recommendation — Verify access checks on every protected action and object, then fix any bypass paths. Log security-relevant access events and review anomalies for abuse of protected functions. | ||
| CIS Controls v8 | CIS-16 — Application Software Security | The subject is a web application access-control flaw that must be prioritised in app security hygiene. |
| Recommendation — Track application flaws to remediation and validate that access-control defects are corrected. | ||
| NIST SP 800-53 Rev 5 | AC-3 — Access Enforcement | The vulnerability is an access-enforcement failure in a business application. |
| AU-6 — Audit Record Review, Analysis, and Reporting | Post-exploitation review depends on analysing audit records for suspicious access and admin activity. | |
| Recommendation — Enforce access decisions consistently for each protected Confluence object and function. Review audit records for abnormal access, permission changes, and administrative abuse. | ||
Practitioner Guidance
Why practitioners should care: Treat exploited access-control bugs in collaboration software as enterprise access events, not just application defects. The business impact often comes from what the platform already knows and whom it already trusts.
What to watch for: Prioritise internet-facing instances, high-privilege spaces, and environments where Confluence is linked to SSO, automation, or shared admin processes. Those are the places where abuse is most likely to spread beyond the wiki itself.
Practitioner takeaway: If you cannot patch immediately, reduce exposure first, then verify whether any adjacent identities, tokens, or sessions need follow-up review after remediation.
Related resources from NHI Mgmt Group
- CVE-2023-22518 (Atlassian Confluence Data Center and Server Improper Authorization)
- CVE-2023-22527 (Atlassian Confluence Data Center and Server Template Injection)
- CVE-2021-26086 (Atlassian Jira Server and Data Center Path Traversal)
- How should security teams control what an MCP server can access before connecting it to business data sources?
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Reviewed and updated by the NHIMG editorial team on October 17, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org