{"id":"CVE-2023-22527","kind":"vulnerability","aliases":["CVE-2023-22527"],"related":[],"title":"A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated…","description":"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.\n\nMost 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.","summary":"Atlassian Confluence Data Center and Server has an unauthenticated OGNL template injection flaw. An attacker can send a crafted request and run code on the server.","severity":"critical","cvss":10.0,"epss":null,"exploited":true,"exploited_at":"2024-01-24T00:00:00+00:00","products":[{"name":"Atlassian Confluence Data Center and Server","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"atlassian confluence data center","fixed":["8.5.4"],"affected":">= 8.0.0, < 8.5.4","ecosystem":"vendor"},{"name":"atlassian confluence data center","fixed":[],"affected":"= 8.7.0","ecosystem":"vendor"},{"name":"atlassian confluence server","fixed":["8.5.4"],"affected":">= 8.0.0, < 8.5.4","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["atlassian","confluence","exploited","package","ransomware","self-hosted"],"not_affected_if":["atlassian-cloud"],"how_to_check":null,"fix":"Apply the mitigations per Atlassian's vendor instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).","status":"open","published_at":"2024-01-16T05:15:08+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:02:25+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-23T21:02:25Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations per Atlassian's vendor instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).","reach":"internet","impact":"high","summary":"Atlassian Confluence Data Center and Server has an unauthenticated OGNL template injection flaw. An attacker can send a crafted request and run code on the server.","category":"package","who_cares":["confluence","self-hosted","atlassian"],"confidence":0.8,"needs_auth":"no","worst_case":"Unauthenticated attacker runs code on the Confluence server.","analyst_note":"Find the affected and fixed version ranges and the exact mitigation steps in Atlassian's advisory; the sources give neither, and the CISA KEV entry lists the ransomware tag.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["atlassian-cloud"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000457,"input_tokens":2833,"output_tokens":347,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':18A,21A '-22527':19A,22A 'achiev':92C 'action':106C 'affect':96C,101C,119C 'allow':14A,87C 'and':27A 'atlassian':23A,29A,33A,37A,40B,48B,133C,155C 'attack':62B,90C 'bulletin':159C 'care':138C 'center':11A,26A,32A,36A,51B,84C,114C 'code':70B 'confluenc':9A,41B,49B,82C,112C 'confluence':24A,30A,34A,38A 'craft':66B 'critic':151C 'custom':98C,136C 'cve':17A,20A 'data':10A,25A,31A,35A,50B,83C,113C 'exploit':42B 'flaw':60B 'host':47B 'howev':132C 'immedi':105C 'inject':3A,59B,76C 'instal':140C 'instanc':97C,147C 'januari':157C 'latest':142C 'mitig':127C 'must':103C 'non':150C 'non-crit':149C 'ognl':57B 'older':6A,79C 'outlin':153C 'packag':43B 'protect':145C 'ransomwar':44B 'rce':93C 'recent':108C 'recommend':134C 'regular':129C 'request':67B 'run':69B 'secur':158C 'self':46B 'self-host':45B 'send':64B 'server':13A,28A,39A,53B,73B,86C,116C 'support':109C 'take':104C,137C 'templat':2A,58B,75C 'ultim':126C 'unauthent':16A,56B,89C 'updat':131C 'use':99C 'version':7A,80C,102C,110C,130C,143C 'vulner':4A,77C,122C,152C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2024-01-16T05:15:08+00:00","kev":{"dateAdded":"2024-01-24","dueDate":"2024-02-14","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-22527","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-22527","severity":null,"published_at":"2024-01-24T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T13:39:30+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-22527","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-22527","severity":null,"published_at":"2024-01-16T05:15:08+00:00","modified_at":"2026-06-17T05:35:38+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}