{"id":"CVE-2024-12139","kind":"vulnerability","aliases":["CVE-2024-12139"],"related":[],"title":"Error pages reflect URL input, enabling phishing-style fake error messages","description":"The error handling implementation fails to properly sanitize or validate user-supplied input within URL parameters under specific conditions. This allows end-users to manipulate the error messages that are displayed by the application.\n\nBy exploiting this vulnerability, malicious actors can inject arbitrary content into error messages. This enables them to perform social engineering attacks, such as phishing or credential theft, by replacing legitimate error messages with malicious content, misleading users into compromising sensitive information or taking harmful actions.","summary":"The error handling in an unnamed application does not sanitize user-supplied URL parameters under specific conditions. An attacker can craft a link that injects arbitrary content into displayed error messages, enabling phishing or credential theft.","severity":"medium","cvss":4.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["other","web-applications"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T18:18:33+00:00","first_seen_at":"2026-11-02T18:24:24+00:00","triaged_at":"2026-11-02T18:24:34+00:00","updated_at":"2026-11-02T18:24:34+00:00","category":"other","confidence":0.3,"triage":{"at":"2026-11-02T18:24:34Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Error pages reflect URL input, enabling phishing-style fake error messages","impact":"low","summary":"The error handling in an unnamed application does not sanitize user-supplied URL parameters under specific conditions. An attacker can craft a link that injects arbitrary content into displayed error messages, enabling phishing or credential theft.","audience":"businesses","category":"other","nicknames":[],"who_cares":["web-applications"],"confidence":0.3,"fix_status":"unknown","needs_auth":"no","worst_case":"Users are shown attacker-chosen content in error messages, enabling phishing","analyst_note":"Identify the affected product and versions from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2024-12139 and check the vendor advisory.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"The sources do not name the affected product or version; they describe only a condition under which URL parameters reach error messages without sanitization. Teams should look for web applications that echo URL parameters into error output. unknown","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000634,"input_tokens":4179,"output_tokens":433,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-12139':15A,18A '-2024':14A,17A 'action':140C 'actor':101C 'allow':81C 'applic':22B,29B,95C 'arbitrari':49B,104C 'attack':42B,116C 'compromis':134C 'condit':40B,79C 'content':50B,105C,130C 'craft':44B 'credenti':58B,121C 'cve':13A,16A 'display':52B,92C 'enabl':6A,55B,110C 'end':83C 'end-us':82C 'engin':115C 'error':1A,11A,24B,53B,61C,88C,107C,126C 'exploit':97C 'fail':64C 'fake':10A 'handl':25B,62C 'harm':139C 'implement':63C 'inform':136C 'inject':48B,103C 'input':5A,73C 'legitim':125C 'link':46B 'malici':100C,129C 'manipul':86C 'messag':12A,54B,89C,108C,127C 'mislead':131C 'page':2A 'paramet':37B,76C 'perform':113C 'phish':8A,56B,119C 'phishing-styl':7A 'proper':66C 'reflect':3A 'replac':124C 'sanit':32B,67C 'sensit':135C 'social':114C 'specif':39B,78C 'style':9A 'suppli':35B,72C 'take':138C 'theft':59B,122C 'unnam':28B 'url':4A,36B,75C 'user':34B,71C,84C,132C 'user-suppli':33B,70C 'valid':69C 'vulner':99C 'web':21B 'web-appl':20B 'within':74C","nicknames":[],"mitigations":[],"who_affected":"The sources do not name the affected product or version; they describe only a condition under which URL parameters reach error messages without sanitization. Teams should look for web applications that echo URL parameters into error output. unknown","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["medium","other","webapplications"],"first_public_at":"2026-11-02T18:18:33+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","cvss_by":"ed10eef1-636d-4fbe-9993-6890dfa878f8","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2024-12139","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-12139","severity":null,"published_at":"2026-11-02T18:18:33+00:00","modified_at":"2026-11-02T18:18:33+00:00","first_seen_at":"2026-11-02T18:24:24+00:00","fetched_at":"2026-11-02T18:24:24+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"}