CVE-2021-26084Vulnerability
Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability
Exploited in the wildCISA added it to its Known Exploited Vulnerabilities list on .
Reported by 1 independent source · first reported by NCSC UK · last reported
Last reported 20 months ago
CISA KEVAdded 3 Nov 2021
Fix due 17 Nov 2021
Used by ransomware: knownCISA KEV catalogue
Fix due 17 Nov 2021
Used by ransomware: knownCISA KEV catalogue
EPSS100.0%
higher than 99% of CVEsFIRST EPSS, as of 11 Oct 2026
higher than 99% of CVEsFIRST EPSS, as of 11 Oct 2026
What the reports say
1 report, newest first · the exact sentence from each-
A method to assess 'forgivable' vs 'unforgivable' vulnerabilities“ZDI (last) (2021) Zero Day Initiative — CVE-2021-26084: Details on the Recently Exploited Atlassian Confluence OGNL Injection Bug., Zero Day Initiative Available at: Zero Day Initiative — CVE-2021-26084: Details on the Recently Exploited Atlassian Confluence OGNL Injection Bug (A…”
Indicators reported together
named in the same reports- iglu[.]netin 1 report
- hxxps://news.blackduck[.]com/2015-07-29-Coverity-Scan-Open-Source-Report-Shows-Commercial-Code-Is-More-Compliant-to-Security-Standards-than-Open-Source-Codein 1 report
- news.blackduck[.]comin 1 report
- hxxps://www.acsac[.]org/2007/workshop/Howard.pdfin 1 report
- www.acsac[.]orgin 1 report
- hxxps://www.outsystems[.]com/blog/posts/attack-surface/in 1 report
- www.outsystems[.]comin 1 report
Copy these 7 indicators · defanged
Also named with it: CVE-2023-34362, CVE-2023-36934, CVE-2023-27997
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