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Atlassian released security patches to fix critical flaw in Confluence

criticalVulnerabilityimportance 60CVE-2021-26084

Vulnerabilities mentionedAll →

CVEVulnerabilityCVSSEPSSFlagsAffectedExposurePublished
CVE-2021-26084
Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability

CVE-2021-26084 is an OGNL injection vulnerability (CWE-917) in Atlassian Confluence Server and Data Center that may allow an unauthenticated attacker to execute arbitrary code. Any organization running Confluence Server or Data Center is potentially affected. It is significant because it is listed in CISA's Known Exploited Vulnerabilities catalog with known ransomware use, and EPSS assigns a 100.0% probability of exploitation within 30 days (100th percentile).

Do: Apply updates to Confluence Server and Data Center per Atlassian's instructions, which is the required action in the CISA KEV listing. Prioritize remediation given confirmed in-the-wild exploitation and known ransomware use.

9.8100% KEV ransomware PoC
  • Atlassian Confluence Server and Data Center
Full article202 words · extracted from securityaffairs.com · click to collapse

Atlassian released patches to fix a critical flaw, tracked as CVE-2021-26084, affecting the Confluence enterprise collaboration product.

Atlassian released security patches to address a critical vulnerability, tracked as CVE-2021-26084, affecting the Confluence enterprise collaboration product.

The flaw is an OGNL injection issue that can be exploited by an authenticated attacker to execute arbitrary code on affected Confluence Server and Data Center instances.

“An OGNL injection vulnerability exists that would allow an authenticated user, and in some instances unauthenticated user, to execute arbitrary code on a Confluence Server or Data Center instance. ” reads the advisory published by the company.

The issue was discovered by Benny Jacob (SnowyOwl) through the Atlassian public bug bounty program, the vulnerability received a CVSS score of 9.8.

Affected versions are:

  • version < 6.13.23
  • 6.14.0 ≤ version < 7.4.11
  • 7.5.0 ≤ version < 7.11.5
  • 7.12.0 ≤ version < 7.12.5

Fixed versions:

  • 6.13.23
  • 7.4.11
  • 7.11.6
  • 7.12.5
  • 7.13.0  

The company has fixed the flaw with the release of versions 6.13.23, 7.4.11, 7.11.6, 7.12.5 and 7.13.0.

Organizations should install the security patches as soon as possible.

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Pierluigi Paganini

(SecurityAffairs – hacking, Atlassian Confluence)

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Text extracted automatically; images, tables and formatting may be missing. Original: https://securityaffairs.com/121547/security/atlassian-confluence-rce.html