CVE-2021-26085 KEV EXPLOIT
5.3
MEDIUM · CVSS 3.1 · EPSS 99.9% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2022-04-18.
Description
Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.
Scoring
| CVSS | 5.3 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| EPSS | 99.94% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-425 |
| On CISA KEV | yes — remediate by 2022-04-18 |
| Public exploit | yes |
| Published | 2021-08-03 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability |
|---|---|
| Added | 2022-03-28 |
| Due | 2022-04-18 |
| Vendor / product | Atlassian / Confluence Server |
| Ransomware use | known |
Affected (2)
| Vendor | Product |
|---|---|
| atlassian | confluence data center |
| atlassian | confluence server |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Atlassian Confluence 7.12.2 - Pre-Authorization Arbitrary File Read | 2021-10-05 |
References
- http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html
- https://jira.atlassian.com/browse/CONFSERVER-67893
- http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html
- https://jira.atlassian.com/browse/CONFSERVER-67893
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085
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