{"id":"CVE-2026-48939","published":"2026-06-20T13:16:42Z","modified":"2026-10-25T23:10:00Z","title":"iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability","vendor":"iCagenda","product":"iCagenda","tier":"core","eol":null,"description":{"text":"A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.","provenance":"source","from":"NVD"},"summary":{"text":"The iCagenda extension for Joomla contains an unrestricted file upload flaw in its file attachment feature. An attacker can upload arbitrary files, including PHP code that is then executed, and the attack requires no privileges, no user interaction, and only network access.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:10:05Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.20069,"percentile":0.97443,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-07-10","dueDate":"2026-07-13","ransomware":false,"requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","notes":"https://www.icagenda.com/#download ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-48939","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-07-10","exploitedFirstSeen":"2026-07-10","ransomware":false,"evidence":[{"url":"https://previdian.com/CVE-2026-48939","date":"2026-07-10"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-07-10"},{"url":"https://www.recordedfuture.com/blog/july-2026-cve-landscape","date":"2026-08-07"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":38,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"}],"references":[{"url":"https://www.icagenda.com/","tags":["Product"]},{"url":"https://github.com/Polosss/By-Poloss..-..CVE-2026-48939","tags":["Exploit","Third Party Advisory"]},{"url":"https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939","tags":["US Government Resource"]},{"url":"https://www.icagenda.com/docs/changelog/icagenda-3-9-15","tags":["Release Notes"]},{"url":"https://www.icagenda.com/docs/changelog/icagenda-4-0-8","tags":["Release Notes"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Unauthenticated file upload to public-facing web app","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows the upload of arbitrary files in the file attachment feature","start":53,"end":120}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Uploaded PHP code executed on server","mappingType":"primary_impact","evidence":[{"from":"description","quote":"resulting in PHP code upload and execution","start":133,"end":175}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-38109","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38109","exploited":true,"exploitedSince":"2026-07-10","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":3,"skipped":0,"earliest":"2026-06-29","earliestUrl":"https://github.com/Polosss/By-Poloss..-..CVE-2026-48939","repos":[{"name":"shinthink/CVE-2026-48939","url":"https://github.com/shinthink/CVE-2026-48939","stars":2,"created":"2026-07-05"},{"name":"Polosss/By-Poloss..-..CVE-2026-48939","url":"https://github.com/Polosss/By-Poloss..-..CVE-2026-48939","stars":1,"created":"2026-06-29"},{"name":"ChiefYoru/CVE-2026-48939_PoC","url":"https://github.com/ChiefYoru/CVE-2026-48939_PoC","stars":0,"created":"2026-07-18"}]},"nuclei":[{"id":"CVE-2026-48939","name":"Joomla iCagenda < 3.9.10 - Unauthenticated Arbitrary File Upload RCE","severity":"critical","path":"http/cves/2026/CVE-2026-48939.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-48939.yaml"}],"first":{"date":"2026-06-29","source":"PoC-in-GitHub","url":"https://github.com/Polosss/By-Poloss..-..CVE-2026-48939"},"provenance":"source"},"exploitRefs":["https://github.com/Polosss/By-Poloss..-..CVE-2026-48939"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2026-06-20","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48939","provenance":"source"},{"date":"2026-06-29","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/Polosss/By-Poloss..-..CVE-2026-48939","provenance":"source"},{"date":"2026-07-10","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://previdian.com/CVE-2026-48939","provenance":"source"},{"date":"2026-07-10","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-07-10","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38109","provenance":"source"}],"speed":{"daysToPublicExploit":9,"firstExploitFrom":"PoC-in-GitHub","daysToKev":20},"priority":{"score":74.3,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":5.0,"detail":"added 113 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.49,"detail":"percentile 0.9744"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 3 PoC-in-GitHub repos; 1 nuclei template"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"38 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}