{"cve":"CVE-2018-1081","nvd":{"published":"2018-04-04T21:29:00.213","modified":"2026-06-17T01:50:26.243","status":"Modified","description":"A flaw was found in Moodle 3.4 to 3.4.1, 3.3 to 3.3.4, 3.2 to 3.2.7, 3.1 to 3.1.10 and earlier unsupported versions. Unauthenticated users can trigger custom messages to admin via paypal enrol script. Paypal IPN callback script should only send error emails to admin after request origin was verified, otherwise admin email can be spammed.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-79"],"references":["http://www.securityfocus.com/bid/103728","https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-61392","https://moodle.org/mod/forum/discuss.php?d=367938","http://www.securityfocus.com/bid/103728","https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-61392"],"products":["moodle:moodle"],"source":"nvd","synced_at":"2026-10-19T20:49:59.483420567+00:00"},"epss":{"cve":"CVE-2018-1081","score":0.0141,"percentile":0.7266,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}