CVE-2019-15006: There was a man-in-the-middle (MITM) vulnerability present in the Confluence Previews plugin in Confluence Server and Confluence Data Center. This plu...

Description

There was a man-in-the-middle (MITM) vulnerability present in the Confluence Previews plugin in Confluence Server and Confluence Data Center. This plugin was used to facilitate communication with the Atlassian Companion application. The Confluence Previews plugin in Confluence Server and Confluence Data Center communicated with the Companion application via the atlassian-domain-for-localhost-connections-only.com domain name, the DNS A record of which points at 127.0.0.1. Additionally, a signed certificate for the domain was publicly distributed with the Companion application. An attacker in the position to control DNS resolution of their victim could carry out a man-in-the-middle (MITM) attack between Confluence Server (or Confluence Data Center) and the atlassian-domain-for-localhost-connections-only.com domain intended to be used with the Companion application. This certificate has been revoked, however, usage of the atlassian-domain-for-localhost-connections-only.com domain name was still present in Confluence Server and Confluence Data Center. An attacker could perform the described attack by denying their victim access to certificate revocation information, and carry out a man-in-the-middle (MITM) attack to observe files being edited using the Companion application and/or modify them, and access some limited user information.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

EPSS Probability

1.91%

77.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-913

Affected Software

Vendor	Product	Versions
Atlassian	Confluence	>= 6.11.0, < 6.13.10
Atlassian	Confluence Server	>= 6.14.0, < 6.15.10
Atlassian	Confluence Server	>= 7.0.1, < 7.0.5
Atlassian	Confluence Server	>= 7.1.0, < 7.1.2

References

http://packetstormsecurity.com/files/155742/Atlassian-Confluence-Man-In-The-Middle.htmlThird Party Advisory, VDB Entry
https://confluence.atlassian.com/doc/confluence-security-advisory-2019-12-18-982324349.htmlPatch, Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-59244Patch, Vendor Advisory
https://seclists.org/bugtraq/2019/Dec/36Mailing List, Third Party Advisory
https://twitter.com/SwiftOnSecurity/status/1202034106495832067Issue Tracking, Third Party Advisory
http://packetstormsecurity.com/files/155742/Atlassian-Confluence-Man-In-The-Middle.htmlThird Party Advisory, VDB Entry
https://confluence.atlassian.com/doc/confluence-security-advisory-2019-12-18-982324349.htmlPatch, Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-59244Patch, Vendor Advisory
https://seclists.org/bugtraq/2019/Dec/36Mailing List, Third Party Advisory
https://twitter.com/SwiftOnSecurity/status/1202034106495832067Issue Tracking, Third Party Advisory

Timeline

Published: Dec 19, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-15006?

There was a man-in-the-middle (MITM) vulnerability present in the Confluence Previews plugin in Confluence Server and Confluence Data Center. This plugin was used to facilitate communication with the Atlassian Companion application. The Confluence Previews plugin in Confluence Server and Confluence Data Center communicated with the Companion application via the atlassian-domain-for-localhost-connections-only.com domain name, the DNS A record of which points at 127.0.0.1. Additionally, a signed certificate for the domain was publicly distributed with the Companion application. An attacker in the position to control DNS resolution of their victim could carry out a man-in-the-middle (MITM) attack between Confluence Server (or Confluence Data Center) and the atlassian-domain-for-localhost-connections-only.com domain intended to be used with the Companion application. This certificate has been revoked, however, usage of the atlassian-domain-for-localhost-connections-only.com domain name was still present in Confluence Server and Confluence Data Center. An attacker could perform the described attack by denying their victim access to certificate revocation information, and carry out a man-in-the-middle (MITM) attack to observe files being edited using the Companion application and/or modify them, and access some limited user information.

How severe is CVE-2019-15006?

CVE-2019-15006 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.91% probability of exploitation in the next 30 days.

How do I fix CVE-2019-15006?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.