Invision Power Board (aka IPB or IP.Board) 2.x through 3.0.4, when Internet Explorer 5 is used, allows XSS via a .txt attachment.
https://www.securityfocus.com/bid/37263/info
Source: Mitre, NVD
Published: 2020-03-13
Updated: 2020-03-18
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.0057