CVE-2019-18987

CVE-2019-18987 is a medium-severity information disclosure vulnerability affecting the AbuseFilter extension in MediaWiki versions through 1.34. It allows for the exposure of previous versions of a public abuse filter, potentially revealing private or sensitive information contained within its definition. The CVSS score of 5.3 indicates a network-based attack with low complexity, requiring no user interaction, leading to a low impact on confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.