Atlassian has published its April 2025 Security Bulletin, highlighting multiple high-severity vulnerabilities across key enterprise products, including Bamboo, Confluence, Jira, and Jira Service Management. These flaws pose serious security risks, as they could enable denial-of-service (DoS) attacks, XML External Entity (XXE) injection exploits, and dependency-based compromises. Organizations relying on Atlassian software must immediately apply security patches to prevent exploitation.
Cybercriminals are actively scanning for unpatched systems, increasing the urgency of implementing mitigation strategies to secure affected environments.
1. Breakdown of Key Vulnerabilities in Atlassian Products
🔴 Critical & High-Severity Vulnerabilities Addressed
1️⃣ CVE-2024-57699 – Denial-of-Service (DoS) Vulnerability in Bamboo & Jira
- Affected Products:
- Bamboo Data Center & Server
- Jira Software Data Center & Server
- Impact:
- Exploits a flaw in the
net.minidev:json-smartdependency, allowing attackers to trigger excessive resource consumption, crashing affected instances. - If successfully exploited, this attack could disrupt continuous integration (CI/CD) pipelines and workflow automation in enterprise environments.
- Fixed Versions:
- Bamboo 10.2.3 (LTS)
- Jira 10.5.1 (Data Center)
2️⃣ CVE-2025-24970 – Netty Handler DoS in Confluence
- Affected Products:
- Confluence Data Center & Server
- Impact:
- Attackers can exploit thread exhaustion vulnerabilities in the
io.netty:netty-handlerlibrary, leading to service disruptions. - This attack could result in failure of Confluence-based enterprise collaboration tools, affecting knowledge-sharing environments.
- Fixed Versions:
- Confluence 9.4.0 (Data Center)
- Confluence 9.2.3 (LTS)
3️⃣ CVE-2019-10172 – XML External Entity (XXE) Injection in Confluence
- Affected Products:
- Confluence Data Center & Server
- Impact:
- A flaw in
org.codehaus.jackson:jackson-mapper-aslenables attackers to exploit XML parsing logic, potentially leading to unauthorized file access and data leakage. - Unpatched systems risk compromising sensitive corporate documentation, including internal reports and credentials.
- Fixed Version: Confluence 8.5.21 (LTS)
4️⃣ CVE-2021-33813 – XML External Entity (XXE) Injection in Jira Core & Jira Software
- Affected Products:
- Jira Data Center & Server
- Impact:
- Attackers can manipulate XML parsing requests, gaining access to internal system configuration files.
- This vulnerability can expose API keys, database credentials, and internal Atlassian instance configurations.
- Fixed Versions:
- Jira 10.5.1 (Data Center)
- Jira 10.3.5 (LTS)
2. Why These Vulnerabilities Matter
🚨 Potential Exploitation Risks – Security researchers warn that these flaws could be weaponized by cybercriminals, leading to disruptions, unauthorized access, or exfiltration of sensitive data.
🚨 Enterprise-Wide Impact – Atlassian products serve as critical components of DevOps, ITSM, and knowledge management workflows, making exploitation highly disruptive.
🚨 Mandatory Compliance for Federal Agencies – Under Binding Operational Directive (BOD) 22-01, U.S. government agencies must remediate these vulnerabilities by the assigned deadline.
3. Recommended Mitigation Strategies
✅ Immediate Security Patch Deployment
🔹 Upgrade affected Atlassian products to the latest fixed versions listed in the security bulletin.
🔹 Ensure dependencies are updated to remove vulnerable third-party libraries (e.g., Netty, Jackson Mapper).
🔒 Strengthen System Protections
🔸 Implement Web Application Firewalls (WAFs) to filter malicious requests targeting XML parsing mechanisms.
🔸 Enforce multi-factor authentication (MFA) for Jira and Confluence administrative accounts.
🔸 Deploy Intrusion Detection Systems (IDS) to monitor suspicious API interactions.
4. Conclusion & Next Steps
🚨 Atlassian’s April 2025 Security Bulletin underscores the urgency of applying security patches to prevent the exploitation of multiple vulnerabilities affecting DevOps, collaboration, and ITSM infrastructure.
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