CVE-2023-22527A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance.
Updated under an hour ago ()
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It affects Atlassian Confluence Data Center and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 24, 2024; federal agencies had to remediate by Feb 14, 2024, and it is known to be used in ransomware. Treat that date as your deadline.
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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.
- CVSS
- 10.0 CRITICAL (v3.0, CNA)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-74
- Known exploited
- Added to CISA KEV Jan 24, 2024; federal remediation due Feb 14, 2024; known ransomware useApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 99.98% (percentile 100)
- Assigned by
- atlassian
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Atlassian Confluence Data Center atlassian:confluence_data_center (from the name) | before 8.0.0 not affected; from 8.0.0; from 8.1.0; from 8.2.0; from 8.3.0; from 8.4.0; from 8.5.0; from 8.5.1; and 5 more ranges | CNA record |
Atlassian Confluence Server atlassian:confluence_server (from the name) | before 8.0.0 not affected; from 8.0.0; from 8.1.0; from 8.2.0; from 8.3.0; from 8.4.0; from 8.5.0; from 8.5.1; and 4 more ranges | CNA record |
atlassian confluence_data_center atlassian:confluence_data_center | from 8.0.0 before 8.5.4 | CISA ADP |
atlassian confluence_server atlassian:confluence_server | from 8.0.0 before 8.5.4 | CISA ADP |
atlassian confluence_data_center atlassian:confluence_data_center | from 8.0.0 before 8.5.4; 8.7.0 | NVD |
atlassian confluence_server atlassian:confluence_server | from 8.0.0 before 8.5.4 | NVD |
References
- https://confluence.atlassian.com/pages/viewpage.action?pageId=1333335615vendor-advisory
- https://jira.atlassian.com/browse/CONFSERVER-93833issue-tracking, vendor-advisory
- http://packetstormsecurity.com/files/176789/Atlassian-Confluence-SSTI-Injection.htmlexploit, third-party-advisory, vdb-entry
- https://www.vicarius.io/vsociety/posts/pwning-confluence-via-ognl-injection-for-fun-and-learning-cve-2023-22527exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22527us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.