{"id":"CVE-2026-48939","kind":"vulnerability","aliases":["CVE-2026-48939"],"related":[],"title":"joomlic icagenda: A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment…","description":"iCagenda contains an unrestricted upload of file with dangerous type vulnerability that allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.\n\nCISA required action: 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.","summary":"iCagenda, a Joomla event calendar extension, lets users upload arbitrary file types through its file attachment feature. An attacker can upload a PHP file and run it on the server, which gives them remote code execution.","severity":"critical","cvss":10.0,"epss":null,"exploited":true,"exploited_at":"2026-07-10T00:00:00+00:00","products":[{"name":"iCagenda iCagenda","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"joomlic icagenda","fixed":["3.9.15"],"affected":">= 3.2.1, < 3.9.15","ecosystem":"vendor"},{"name":"joomlic icagenda","fixed":["4.0.8"],"affected":">= 4.0.0, < 4.0.8","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","icagenda","joomla","php","runtime","self-hosted"],"not_affected_if":["icagenda-not-installed"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-06-20T13:16:42+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:33:42+00:00","updated_at":"2026-10-23T23:44:51+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T20:33:42Z","model":"claude-haiku-5-5","output":{"fix":"unknown","summary":"iCagenda, a Joomla event calendar extension, lets users upload arbitrary file types through its file attachment feature. An attacker can upload a PHP file and run it on the server, which gives them remote code execution.","category":"runtime","who_cares":["joomla","php","icagenda","self-hosted"],"confidence":0.6,"analyst_note":"Sources list only the CISA KEV entry; find the vendor advisory for affected and fixed versions, the patch, and any IOCs for the upload path.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["icagenda-not-installed"],"severity_if_unknown":"critical"},"cost_usd":0.00034,"input_tokens":2219,"output_tokens":237,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-04':125C,151C,182C '-2026':22A,25A '-48939':23A,26A '26':124C,150C,181C 'accord':114C 'action':110C 'adher':178C 'allow':11A,89C 'appli':111C 'applic':148C 'arbitrari':15A,50B,93C 'asset':172C 'attach':20A,56B,98C 'attack':59B 'base':129C 'bod':123C,149C,180C 'calendar':45B 'cisa':108C,121C,138C 'cloud':154C 'code':75B,104C 'complianc':119C 'contain':78C 'cve':21A,24A 'danger':85C 'discontinu':157C 'ensur':118C,177C 'evalu':170C 'event':44B 'execut':76B,107C 'exploit':33B 'exposur':175C 'extens':8A,46B 'featur':57B,99C 'file':16A,19A,51B,55B,64B,83C,94C,97C 'follow':147C 'forens':140C 'give':72B 'guidanc':136C,152C 'guidelin':184C 'host':40B 'icagenda':2A,7A,27A,28A,30A,32A,34B,41B,77C 'instruct':117C 'internet':174C 'joomla':10A,35B,43B 'joomlic':1A,29A,31A 'let':47B 'mitig':112C,163C 'note':135C,146C 'patch':183C 'php':36B,63B,103C 'priorit':126C 'product':161C 'remot':74B 'requir':109C,142C 'respons':168C 'result':101C 'risk':131C 'run':66B 'runtim':37B 'secur':127C 'see':132C,143C 'self':39B 'self-host':38B 'server':70B 'servic':155C 'stakehold':166C 'triag':141C 'type':52B,86C 'ultim':100C 'unavail':165C 'unrestrict':80C 'updat':128C 'upload':13A,49B,61B,81C,91C,105C 'url':133C,144C 'use':158C 'user':48B 'vendor':116C 'vulner':4A,87C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-06-20T13:16:42+00:00","kev":{"dateAdded":"2026-07-10","dueDate":"2026-07-13","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.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/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:Y/R:X/V:X/RE:X/U:Red","cvss_by":"security@joomla.org","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2026-48939","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-48939","severity":null,"published_at":"2026-07-10T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T19:35:19+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-48939","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48939","severity":null,"published_at":"2026-06-20T13:16:42+00:00","modified_at":"2026-07-11T05:16:34+00:00","first_seen_at":"2026-10-23T23:44:51+00:00","fetched_at":"2026-10-23T23:44:51+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"}