CVE-2021-26072 json
The WidgetConnector plugin in Confluence Server and Confluence Data Center before version 5.8.6 allowed remote attackers to manipulate the…
published 2021-04-01 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-12895
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 41.2%
- EPSS 41.2% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
The WidgetConnector plugin in Confluence Server and Confluence Data Center before version 5.8.6 allowed remote attackers to manipulate the content of internal network resources via a blind Server-Side Request Forgery (SSRF) vulnerability.
Patch / fix
- Atlassian Confluence Server 5.8.6
- Atlassian Confluence Data Center 5.8.6
Exploit prediction
41.22% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Atlassian Confluence < 5.8.6 - Server-Side Request Forgery nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
Affected products
- Atlassian Confluence Server
- Atlassian Confluence Data Center
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
jira.atlassian.com
/browse/CONFSERVER-61399
issue-tracking, patch, vendor-advisory
Sources
- CVE List CVE-2021-26072
- NVD CVE-2021-26072
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.