CVE-2021-26084
CriticalActively exploited (CISA KEV)Known to be used in ransomware campaigns
Description
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Atlassian Confluence Server and Data Center
PublishedAug 30, 2021
First seenAug 30, 2021
Added to KEVNov 3, 2021
Weakness typeCWE-917Expression language injection
How to fix
CISA required action
Apply updates per vendor instructions.
CISA due date: Nov 17, 2021Update
- atlassian confluence_data_center6.13.23, 7.4.11, 7.11.6, 7.12.5 or later
- atlassian confluence_server6.13.23, 7.4.11, 7.11.6, 7.12.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| atlassian confluence_data_center | v < 6.13.23, 6.14.0 ≤ v < 7.4.11, 7.5.0 ≤ v < 7.11.6, 7.12.0 ≤ v < 7.12.5 | 6.13.23, 7.4.11, 7.11.6, 7.12.5 |
| atlassian confluence_server | v < 6.13.23, 6.14.0 ≤ v < 7.4.11, 7.5.0 ≤ v < 7.11.6, 7.12.0 ≤ v < 7.12.5 | 6.13.23, 7.4.11, 7.11.6, 7.12.5 |
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