{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/jira-data-center-and-server/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Bamboo Data Center and Server","Bitbucket Data Center and Server","Confluence Data Center and Server","Jira Data Center and Server","Jira Service Management Data Center and Server"],"_cs_severities":["high"],"_cs_tags":["atlassian","vulnerability","rce"],"_cs_type":"advisory","_cs_vendors":["Atlassian"],"content_html":"\u003cp\u003eOn April 21, 2026, Atlassian published a security advisory (AV26-375) addressing critical vulnerabilities affecting multiple products, including Bamboo Data Center and Server, Bitbucket Data Center and Server, Confluence Data Center and Server, Jira Data Center and Server, and Jira Service Management Data Center and Server. These vulnerabilities could potentially allow unauthenticated attackers to perform various malicious actions depending on the specific flaw and affected product. The advisory urges users and administrators to review the provided web links and apply the necessary updates promptly to mitigate the risks associated with these vulnerabilities. This widespread impact across core Atlassian products necessitates immediate action from organizations utilizing these platforms.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003cp\u003eDue to the generic nature of the advisory without specific CVEs or exploitation details, a generalized attack chain is presented below, assuming a hypothetical RCE vulnerability in Confluence Server:\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eInitial Access:\u003c/strong\u003e An attacker identifies a vulnerable Confluence Server instance accessible over the internet.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eExploit Delivery:\u003c/strong\u003e The attacker crafts a malicious HTTP request targeting a specific endpoint in Confluence known to be susceptible to command injection.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eCommand Execution:\u003c/strong\u003e The injected command executes on the Confluence server with the privileges of the Confluence application user.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003ePrivilege Escalation:\u003c/strong\u003e The attacker attempts to escalate privileges on the Confluence server, potentially exploiting local vulnerabilities.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eLateral Movement:\u003c/strong\u003e The attacker uses compromised credentials or exploits to move laterally to other systems within the network.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eData Exfiltration/Ransomware Deployment:\u003c/strong\u003e Depending on the attacker\u0026rsquo;s goals, they either exfiltrate sensitive data from the compromised network or deploy ransomware to encrypt systems and demand payment.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of these vulnerabilities could lead to complete compromise of Atlassian products, potentially impacting a large number of organizations relying on these platforms for critical business functions. This could result in data breaches, service disruption, and significant financial losses. The broad range of affected products means that organizations using multiple Atlassian tools are particularly vulnerable.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eReview the Atlassian Security Advisory (\u003ca href=\"https://www.atlassian.com/trust/security/advisories\"\u003ehttps://www.atlassian.com/trust/security/advisories\u003c/a\u003e) and identify if your organization uses any of the listed affected products.\u003c/li\u003e\n\u003cli\u003eApply the necessary updates and patches as recommended by Atlassian in their security bulletin (\u003ca href=\"https://confluence.atlassian.com/security/security-bulletin-april-21-2026-1770913890.html\"\u003ehttps://confluence.atlassian.com/security/security-bulletin-april-21-2026-1770913890.html\u003c/a\u003e) for the affected products.\u003c/li\u003e\n\u003cli\u003eDeploy the provided Sigma rules to your SIEM to detect potential exploitation attempts against Atlassian Confluence servers.\u003c/li\u003e\n\u003cli\u003eEnable webserver logging for Atlassian Confluence to ensure the necessary data is available for detection and investigation.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-09T12:00:00Z","date_published":"2026-05-09T12:00:00Z","id":"/briefs/2026-05-atlassian-advisory/","summary":"Atlassian released a security advisory addressing multiple critical vulnerabilities in Bamboo, Bitbucket, Confluence, Jira, and Jira Service Management Data Center and Server products.","title":"Atlassian Security Advisory Addresses Critical Vulnerabilities in Multiple Products","url":"https://feed.craftedsignal.io/briefs/2026-05-atlassian-advisory/"}],"language":"en","title":"CraftedSignal Threat Feed — Jira Data Center and Server","version":"https://jsonfeed.org/version/1.1"}