CVE-2021-26084

9.8CRITICAL

Key Information:

Vendor
Atlassian
Status
Confluence Server
Confluence Data Center
Vendor
CVE Published:
30 August 2021

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 96%🦅 CISA Reported

Summary

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.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

Confluence Data Center < 6.13.23

Confluence Data Center 6.14.0

Confluence Data Center < 7.4.11

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-26084_Confluence
Created by hev0x

CVE-2021-26084
Created by 0xf4n9x

CVE-2021-26084
Created by dinhbaouit

References

https://jira.atlassian.com/browse/CONFSERVER-67940
x_refsource_MISC
http://packetstormsecurity.com/files/167449/Atlassian-Con...
x_refsource_MISC

EPSS Score

96% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 💰

    Used in Ransomware

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.