CVE-2019-20105

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-03-17 · updated 2026-06-17
Weakness: CWE-306

Description

The EditApplinkServlet resource in the Atlassian Application Links plugin before version 5.4.20, from version 6.0.0 before version 6.0.12, from version 6.1.0 before version 6.1.2, from version 7.0.0 before version 7.0.1, and from version 7.1.0 before version 7.1.3 allows remote attackers who have obtained access to administrator's session to access the EditApplinkServlet resource without needing to re-authenticate to pass "WebSudo" in products that support "WebSudo" through an improper access control vulnerability.

Affected products

Atlassian Application Links: through 5.4.20; from 6.0.0 through 6.0.12; from 6.1.0 before 6.1.2; from 7.1.0 before 7.1.3; 7.0.0 — fixed in 6.1.2, 7.1.3

How to fix

Upgrade to a fixed version: Atlassian Application Links 6.1.2, 7.1.3. Check the vendor advisory for mitigations.

References

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