{"schemaVersion":3,"id":"CVE-2021-4241","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability, which was classified as problematic, was found in phpservermon. Affected is the function setUserLoggedIn of the file src/psm/Service/User.php. The manipulation leads to use of predictable algorithm in random number generator. The exploit has been disclosed to the public and may be used. The name of the patch is bb10a5f3c68527c58073258cb12446782d223bc3. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-213744.","dates":{"published":"2022-11-15T00:00:00.000Z","modified":"2025-04-15T13:13:56.726Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","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":2.6,"severity":"low","vector":"CVSS:3.1/AV:A/AC:H/PR:L/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":0.00821,"percentile":0.5656,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00821},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00792,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00821,"percentile":0.5656}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00821,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00821,"percentile":0.5656}]},"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":[{"id":"REF_447A22827C40AB83","name":"Exploit Reference (huntr.dev)","source":"reference","url":"https://huntr.dev/bounties/1-phpservermon/phpservermon/","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-331","name":"Insufficient Entropy","description":"The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/331.html"},{"id":"CWE-330","name":"Use of Insufficiently Random Values","description":"The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/330.html"}],"affected":[{"vendor":"phpservermonitor","product":"php_server_monitor","name":"php server monitor","label":"php_server_monitor","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/phpservermonitor/php_server_monitor"},{"vendor":"unspecified","product":"phpservermon","name":"phpservermon","label":"phpservermon","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"n/a","noFixRecorded":false,"fixedIn":null}],"versionsText":"n/a","eol":null,"hubHref":"/vendor/unspecified/phpservermon"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://huntr.dev/bounties/1-phpservermon/phpservermon/","label":"huntr.dev/bounties/1-phpservermon/phpservermon/","hostname":"huntr.dev","tags":["Exploit","Patch","Third Party Advisory"]},{"url":"https://github.com/phpservermon/phpservermon/commit/bb10a5f3c68527c58073258cb12446782d223bc3","label":"github.com/phpservermon/phpservermon/commit/bb10a5f3c68527c58073258cb12446782d223bc3","hostname":"github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://vuldb.com/?id.213744","label":"vuldb.com?id.213744","hostname":"vuldb.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2022-11-15T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-04-15T13:13:56.726Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T11:51:30.777Z","stale":false,"partial":false}}