{"cve":"CVE-2020-15164","nvd":{"published":"2020-08-28T17:15:11.920","modified":"2026-06-17T02:56:10.680","status":"Modified","description":"in Scratch Login (MediaWiki extension) before version 1.1, any account can be logged into by using the same username with leading, trailing, or repeated underscore(s), since those are treated as whitespace and trimmed by MediaWiki. This affects all users on any wiki using this extension. Since version 1.1, comments by users whose usernames would be trimmed on MediaWiki are ignored when searching for the verification code.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","score":10.0},"cwes":["CWE-74","CWE-287"],"references":["https://github.com/InternationalScratchWiki/mediawiki-scratch-login/commit/70849ef375016a1061490c8c4744046dbfc3e679","https://github.com/InternationalScratchWiki/mediawiki-scratch-login/security/advisories/GHSA-8fq5-g4m5-6j43","https://github.com/InternationalScratchWiki/mediawiki-scratch-login/commit/70849ef375016a1061490c8c4744046dbfc3e679","https://github.com/InternationalScratchWiki/mediawiki-scratch-login/security/advisories/GHSA-8fq5-g4m5-6j43"],"products":["scratch-wiki:scratch_login"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-15164","score":0.01174,"percentile":0.67524,"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."]}