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Security Research // Access Control

Enterprise Plugin Authorization Bypass

Atlassian Marketplace // JEMH Plugin

Identified an authorization context confusion vulnerability in JEMH (Jira Enterprise Mail Handler), a popular Atlassian Marketplace enterprise plugin with thousands of active installations. The finding demonstrated how plugin-level authorization can be bypassed when Jira's built-in access controls are assumed to cascade to third-party add-ons.

RESPONSIBLY DISCLOSED

Vulnerability Details

  • Plugin trusted Jira's authentication context without performing its own authorization checks, creating an authorization gap
  • Low-privilege users could access administrative endpoints within the JEMH plugin by exploiting this trust boundary
  • The vulnerability expose configuration data and mail handler settings to unauthorized users through predictable API patterns
  • Systematic API enumeration revealed multiple endpoints sharing the same authorization context confusion pattern

Impact & Disclosure

  • Responsibly disclosed to the vendor through coordinated vulnerability disclosure process
  • Vendor acknowledged the finding and implemented authorization fixes in subsequent plugin updates
  • Finding highlights the systemic risk of third-party plugins assuming host application authorization cascades
  • Published to raise awareness about authorization boundary confusion in plugin ecosystems

Technologies & Tools

Atlassian SDKJira REST APIBurp SuiteAuthorization TestingAPI Enumeration

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