{"schemaVersion":3,"id":"CVE-2025-27451","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"For failed login attempts, the application returns different error messages depending on whether the login failed due to an incorrect password or a non-existing username. This allows an attacker to guess usernames until they find an existing one.","dates":{"published":"2025-07-03T11:27:35.372Z","modified":"2025-07-03T13:16:21.696Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00427,"percentile":0.35889,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.052000000000000046,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00375},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00427,"percentile":0.35889}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00375,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00398,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00427,"percentile":0.35889}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-204","name":"Observable Response Discrepancy","description":"The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/204.html"},{"id":"CWE-203","name":"Observable Discrepancy","description":"The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/203.html"}],"affected":[{"vendor":"endress","product":"meac300-fnade4_firmware","name":"meac300-fnade4 firmware","label":"meac300-fnade4_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≤ 0.16.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 0.16.0","eol":null,"hubHref":"/vendor/endress/meac300-fnade4"},{"vendor":"endress+hauser","product":"endress+hauser meac300-fnade4","name":"Endress+Hauser MEAC300-FNADE4","label":"endress+hauser meac300-fnade4","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ <=0.16.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ <=0.16.0","eol":null,"hubHref":"/vendor/endresshauser/endresshauser_meac300-fnade4"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.endress.com","label":"www.endress.com","hostname":"www.endress.com","tags":["X Endress+Hauser","Product"]},{"url":"https://sick.com/psirt","label":"sick.com/psirt","hostname":"sick.com","tags":["X SICK PSIRT Security Advisories","Vendor Advisory"]},{"url":"https://www.cisa.gov/resources-tools/resources/ics-recommended-practices","label":"www.cisa.gov/resources-tools/resources/ics-recommended-practices","hostname":"www.cisa.gov","tags":["X ICS CERT Recommended Practices On Industrial Security","US Government Resource"]},{"url":"https://www.first.org/cvss/calculator/3.1","label":"www.first.org/cvss/calculator/3.1","hostname":"www.first.org","tags":["X CVSS V3.1 Calculator","Not Applicable"]},{"url":"https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json","label":"www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json","hostname":"www.sick.com","tags":["X The Canonical URL.","Vendor Advisory"]},{"url":"https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf","label":"www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf","hostname":"www.sick.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2025-07-03T11:27:35.372Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-07-03T13:16:21.696Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T22:26:49.592Z","stale":false,"partial":false}}