{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/joomla-6.x--6.1.1/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":["cpe:2.3:a:joomla:joomla\\!:*:*:*:*:*:*:*:*"],"_cs_cves":[{"id":"CVE-2026-48896"},{"cvss":4.3,"id":"CVE-2026-48900"},{"id":"CVE-2026-48901"},{"cvss":9.8,"id":"CVE-2026-48904"},{"cvss":6.1,"id":"CVE-2026-48905"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Joomla! \u003c 5.4.6","Joomla! 6.x (\u003c 6.1.1)"],"_cs_severities":["high"],"_cs_tags":["joomla","vulnerability","privilege-escalation","xss","csrf","data-breach"],"_cs_type":"advisory","_cs_vendors":["Joomla"],"content_html":"\u003cp\u003eOn May 27, 2026, CERT-FR published an advisory regarding multiple vulnerabilities affecting Joomla!, a popular open-source content management system. The vulnerabilities exist in versions prior to 5.4.6 and 6.x versions prior to 6.1.1. Successful exploitation of these vulnerabilities could allow attackers to perform privilege escalation, compromise data confidentiality through unauthorized access, conduct cross-site scripting (XSS) attacks to inject malicious code into web pages, and perform cross-site request forgery (CSRF) attacks to execute unwanted actions on behalf of an authenticated user. These vulnerabilities pose a significant threat to organizations using affected versions of Joomla!, potentially leading to data breaches, system compromise, and reputational damage.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a vulnerable Joomla! instance running a version prior to 5.4.6 or a 6.x version prior to 6.1.1.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits CVE-2026-48896, CVE-2026-48897, CVE-2026-48898, CVE-2026-48899, CVE-2026-48900, CVE-2026-48901, CVE-2026-48902, CVE-2026-48903, CVE-2026-48904, or CVE-2026-48905 to bypass authentication or authorization mechanisms.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages a privilege escalation vulnerability (CVE-2026-48898 or CVE-2026-48899) within the com_users component or webservice endpoints to gain elevated privileges, such as administrator access.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits an incorrect access control vulnerability (CVE-2026-48900 or CVE-2026-48901) in sample data plugins or com_scheduler to access sensitive information or execute unauthorized actions.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits an incorrect cache key construction vulnerability (CVE-2026-48902) for inputfilter objects to inject malicious code.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits a transport encryption downgrade vulnerability (CVE-2026-48903) for password and username reset links to intercept credentials.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits inadequate content filtering vulnerabilities (CVE-2026-48904 or CVE-2026-48905) within the checkattribute or cleanattributes filter code to inject malicious scripts.\u003c/li\u003e\n\u003cli\u003eThe attacker uses their elevated privileges to access sensitive data, modify website content, or install malicious extensions, ultimately compromising the Joomla! instance and potentially gaining access to the underlying server.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of these vulnerabilities can lead to a range of severe consequences. Attackers can gain unauthorized access to sensitive data, including user credentials, personal information, and confidential business data. They can also modify website content, deface the website, or inject malicious code to compromise visitors. Privilege escalation can allow attackers to gain complete control over the Joomla! instance and potentially the underlying server, leading to a complete system compromise. The number of potential victims is substantial, given the widespread use of Joomla! across various sectors.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately upgrade Joomla! installations to version 5.4.6 or later, or to version 6.1.1 or later, to patch the vulnerabilities described in the advisory (see Documentation).\u003c/li\u003e\n\u003cli\u003eReview the Joomla! security bulletins 1043-20260511 through 1052-20260520 for specific details on each vulnerability and the corresponding patches (see Documentation).\u003c/li\u003e\n\u003cli\u003eDeploy a web application firewall (WAF) with rules to detect and block exploitation attempts targeting the identified vulnerabilities, focusing on HTTP requests that attempt to exploit CVE-2026-48904 and CVE-2026-48905.\u003c/li\u003e\n\u003cli\u003eImplement the Sigma rule \u0026ldquo;Detect Joomla! CVE-2026-48904/48905 Exploitation Attempt via Attribute Filtering\u0026rdquo; to identify potential exploitation attempts in web server logs.\u003c/li\u003e\n\u003cli\u003eRegularly review user access permissions and roles within Joomla! to minimize the potential impact of privilege escalation vulnerabilities (CVE-2026-48898, CVE-2026-48899).\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious activity, such as unauthorized access attempts, unusual URL patterns, and attempts to inject malicious code, in order to detect potential attacks.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-27T14:32:11Z","date_published":"2026-05-27T14:32:11Z","id":"https://feed.craftedsignal.io/briefs/2026-05-joomla-vulns/","summary":"Multiple vulnerabilities in Joomla! versions before 5.4.6 and 6.x before 6.1.1 can allow attackers to perform privilege escalation, compromise data confidentiality, perform cross-site scripting (XSS), and conduct cross-site request forgery (CSRF) attacks.","title":"Multiple Vulnerabilities in Joomla! Allow Privilege Escalation and Data Breaches","url":"https://feed.craftedsignal.io/briefs/2026-05-joomla-vulns/"}],"language":"en","title":"CraftedSignal Threat Feed — Joomla! 6.x (\u003c 6.1.1)","version":"https://jsonfeed.org/version/1.1"}