Description
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It incorrectly executed certain rules related to blocking accounts after account creation. Such rules would allow for user accounts to be created while blocking only the IP address used to create an account (and not the user account itself). Such rules could also be used by a nefarious, unprivileged user to catalog and enumerate any number of IP addresses related to these account creations.
Remediation
References
Related Vulnerabilities
Oracle JRE CVE-2017-10388 Vulnerability (CVE-2017-10388)
TYPO3 Improper Restriction of XML External Entity Reference Vulnerability (CVE-2020-26229)
MySQL CVE-2019-2683 Vulnerability (CVE-2019-2683)
MediaWiki Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2012-4382)
WordPress Plugin ShareYourCart Information Disclosure (1.6.1)