Pre-Authorization Arbitrary File Read Vulnerability in Atlassian Confluence Server
CVE-2021-26085
Key Information:
- Vendor
Atlassian
- Vendor
- CVE Published:
- 3 August 2021
Badges
What is CVE-2021-26085?
A vulnerability exists in Atlassian Confluence Server that allows remote attackers to access restricted files via the /s/ endpoint. This Pre-Authorization Arbitrary File Read issue affects versions prior to 7.4.10 as well as versions from 7.5.0 up to (but not including) 7.12.3. Attackers exploiting this vulnerability can potentially expose sensitive information that should remain protected.
CISA has reported CVE-2021-26085
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-26085 as being exploited and is known by the CISA as enabling ransomware campaigns.
The CISA's recommendation is: Apply updates per vendor instructions.
Affected Version(s)
Confluence Data Center < 7.4.10
Confluence Data Center 7.5.0
Confluence Data Center < 7.12.3
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
EPSS Score
94% chance of being exploited in the next 30 days.
CVSS V3.1
Timeline
- 💰
Used in Ransomware
- 🦅
CISA Reported
- 🟡
Public PoC available
- 👾
Exploit known to exist
Vulnerability published
Vulnerability Reserved