Auth bypass in Internationalscratchwiki Mediawiki-Scratch-Login
CVE-2020-15164
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.012 (66.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/InternationalScratchWiki/mediawiki-scratch-login/security/advisories… (Third Party Advisory)
- github.com/InternationalScratchWiki/mediawiki-scratch-login/commit/70849ef37501… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15164?
- CVE-2020-15164 is a critical-severity vulnerability in Internationalscratchwiki Mediawiki-Scratch-Login, classified under Improper Authentication. CVSS score: 10.0/10. Published 2020-08-28.
- How severe is CVE-2020-15164?
- Critical severity. CVSS v3 base score is 10.0 out of 10.