CRITICAL🚩 CISA KEV⚡ EXPLOIT🇵🇱 Wersja polska

CVE-2021-26084

CVSS 9.8v3.1pub. 2021-08-30upd. 2025-10-24

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.

🇵🇱 Read Polish description →

CVSS Vector

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

Atlassian Confluence Data Center
APP
Atlassian
< 6.13.236.14.0 – 7.4.11 (excl.)7.5.0 – 7.11.6 (excl.)7.12.0 – 7.12.5 (excl.)
Atlassian Confluence Server
APP
Atlassian
< 6.13.236.14.0 – 7.4.11 (excl.)7.5.0 – 7.11.6 (excl.)7.12.0 – 7.12.5 (excl.)

CISA KEV — detailsi

Vendori: Atlassian ↗
Producti: Confluence Server and Data Center
Added to KEVi: November 3, 2021
Remediation deadline (US Federal)i: November 17, 2021(overdue)
Ransomwarei: Active ransomware campaigns exploit this vulnerability

🔧Advisory Atlassian↗🇺🇸CISA KEV (original)↗

Required action (CISA)i

Apply updates per vendor instructions.

CISA descriptioni

Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code.

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