Known exploited vulnerability
CVE-2023-22527
The short answer
CVE-2023-22527 affects Atlassian Confluence Data Center and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-01-24: attackers are using it, so patch it first.
What it is
A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action. Most recent supported versions of Confluence Data Center and Server are not affected by this vulnerability as it was ultimately mitigated during regular version updates. However, Atlassian recommends that customers take care to install the latest version to protect their instances from non-critical vulnerabilities outlined in Atlassian’s January Security Bulletin.
Weakness: CWE-74.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Jan 24, 2024
Federal due date Feb 14, 2024
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected products
Confluence Data Center, Confluence Server, confluence_data_center, confluence_server. NVD's record lists the exact affected versions.
References
- confluence.atlassian.com/pages/viewpage.action?pageId=1333335615 Vendor Advisory
- jira.atlassian.com/browse/CONFSERVER-93833 Issue TrackingVendor Advisory
- confluence.atlassian.com/pages/viewpage.action?pageId=1333335615 Vendor Advisory
- jira.atlassian.com/browse/CONFSERVER-93833 Issue TrackingVendor Advisory
- www.vicarius.io/vsociety/posts/pwning-confluence-via-ognl-injection-for-fun-and-learning-cve-2023-22527 Exploit
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22527 US Government Resource
Questions
Is CVE-2023-22527 being exploited?
Yes. CISA added CVE-2023-22527 to its Known Exploited Vulnerabilities catalog on 2024-01-24, with a federal remediation due date of 2024-02-14. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2023-22527?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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