CVE-2021-260849.8CriticalCWE-917

CVE-2021-26084: Confluence Server - Remote Code Execution

Atlassian · Confluence Server

Vendor fix available · Affected: Atlassian Confluence Server · Exploitation: in CISA KEV since 3 Nov 2021

Known ransomware use

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

ExploitationIn CISA KEV

In CISA KEVCISA KEV catalogue3 Nov 2021
Exploited (reported): not seen
Scanning observed: not seen
Proof of concept public: not seen
Not established: not seen

99.9%probability of exploitation in the next 30 days

99th percentile

050100

Higher than 99% of scored CVEs

9.8CriticalCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products2

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Atlassian · Confluence Serverbefore 6.13.23; 6.14.0; before 7.4.11; 7.5.0; before 7.11.6; 7.12.0 and 1 more
Atlassian · Confluence Data Centerbefore 6.13.23; 6.14.0; before 7.4.11; 7.5.0; before 7.11.6; 7.12.0 and 1 more

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalogue.
CISA KEV: Listed since 3 Nov 2021 · known ransomware use · catalogue entry
Public check: Confluence Server - Remote Code Execution · nuclei template in projectdiscovery/nuclei-templates
Weakness: Improper Neutralization of Special Elements used in an Expression Language Statement · Command and Code Injection
Vendor: Atlassian
Published: August 2021
Band: Exploited in the wild, August 2021
Bounty reports: 2 disclosed on HackerOne

Disclosed bug bounty reports about CVE-2021-26084

The reports on HackerOne that name this CVE, with HackerOne's own outcome. Titles and metadata only.

RCE in ███ [CVE-2021-26084]U.S. Dept Of Defense · 2023 · critical severityValid
RCE on ███████ [CVE-2021-26084]U.S. Dept Of Defense · 2023 · critical severityValid

What changed

5 Nov
CISA’s KEV entry now notes known ransomware use CISA
3 Nov 2021
CISA added it to the KEV catalogue CISA

CoverageNo articles yet

No CyberSIXT article names CVE-2021-26084 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.