{"id":"CVE-2026-105603","kind":"vulnerability","aliases":["CVE-2026-105603"],"related":[],"title":"DJ-Classifieds Joomla extension: authenticated file upload leads to code execution","description":"Joomla Extension - dj-extensions.com - Authenticated arbitrary file upload in DJ-Classifieds < 3.11.3 - The Joomla extension DJ-Classifieds is vulnerable to an unprivileged file upload, leading to full RCE.","summary":"The DJ-Classifieds extension for Joomla lets a logged-in user upload arbitrary files. The sources say this leads to full remote code execution on the site.","severity":"critical","cvss":9.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["dj-classifieds","joomla","package","php","self-hosted"],"not_affected_if":["extension-not-installed","no-user-registration","version-3.11.3-or-later"],"how_to_check":"- Check the installed DJ-Classifieds version in the Joomla extensions manager, or in the component manifest file.\n- Confirm whether the site has user accounts that can upload files through the classifieds component.","fix":"- DJ-Classifieds: upgrade to `3.11.3` or later (per the affected range '< 3.11.3').","status":"open","published_at":"2026-11-02T19:17:49+00:00","first_seen_at":"2026-11-02T19:24:38+00:00","triaged_at":"2026-11-02T19:26:32+00:00","updated_at":"2026-11-02T19:26:32+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-02T19:26:32Z","model":"claude-haiku-5-5","output":{"fix":"- DJ-Classifieds: upgrade to `3.11.3` or later (per the affected range '< 3.11.3').","reach":"internet","title":"DJ-Classifieds Joomla extension: authenticated file upload leads to code execution","impact":"high","summary":"The DJ-Classifieds extension for Joomla lets a logged-in user upload arbitrary files. The sources say this leads to full remote code execution on the site.","audience":"businesses","category":"package","nicknames":[],"who_cares":["joomla","dj-classifieds","self-hosted","php"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"attacker runs code on the web server","analyst_note":"Confirm the affected version range and whether the vulnerable upload path needs a specific user role; check the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-105603.","how_to_check":"- Check the installed DJ-Classifieds version in the Joomla extensions manager, or in the component manifest file.\n- Confirm whether the site has user accounts that can upload files through the classifieds component.","plain_action":"","needs_analyst":true,"not_affected_if":["extension-not-installed","version-3.11.3-or-later","no-user-registration"],"who_is_affected":"Joomla sites running DJ-Classifieds below 3.11.3 are exposed. The attack needs a user account on the site that can reach the upload function, so sites with open or self-registration are at higher risk. Sites without the extension or with the patched version can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000701,"input_tokens":4133,"output_tokens":575,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-105603':15A,18A '-2026':14A,17A '3.11.3':68C 'arbitrari':42B,61C 'authent':6A,60C 'classifi':3A,21B,31B,67C,74C 'code':11A,52B 'cve':13A,16A 'dj':2A,20B,30B,66C,73C 'dj-classifi':1A,19B,29B,65C,72C 'dj-extensions.com':59C 'execut':12A,53B 'extens':5A,32B,58C,71C 'file':7A,43B,62C,80C 'full':50B,84C 'host':27B 'joomla':4A,22B,34B,57C,70C 'lead':9A,48B,82C 'let':35B 'log':38B 'logged-in':37B 'packag':23B 'php':24B 'rce':85C 'remot':51B 'say':46B 'self':26B 'self-host':25B 'site':56B 'sourc':45B 'unprivileg':79C 'upload':8A,41B,63C,81C 'user':40B 'vulner':76C","nicknames":[],"mitigations":[],"who_affected":"Joomla sites running DJ-Classifieds below 3.11.3 are exposed. The attack needs a user account on the site that can reach the upload function, so sites with open or self-registration are at higher risk. Sites without the extension or with the patched version can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["critical","djclassifieds","joomla","package","php","selfhosted"],"first_public_at":"2026-11-02T19:17:49+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"security@joomla.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-105603","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105603","severity":null,"published_at":"2026-11-02T19:17:49+00:00","modified_at":"2026-11-02T19:17:49+00:00","first_seen_at":"2026-11-02T19:24:38+00:00","fetched_at":"2026-11-02T19:24:38+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"}