CVE-2018-1000855

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-20 · updated 2026-06-17
Weakness: CWE-79

Description

easymon version 1.4 and earlier contains a Cross Site Scripting (XSS) vulnerability in Endpoint where monitoring is mounted that can result in Reflected XSS that affects Firefox. Can be used to steal cookies, depending on the cookie settings.. This attack appear to be exploitable via The victim must click on a crafted URL that contains the XSS payload. This vulnerability appears to have been fixed in 1.4.1 and later.

Affected products

basecamp Easymon: through 1.4

References

https://github.com/basecamp/easymon/issues/26
https://github.com/basecamp/easymon/pull/25
https://github.com/basecamp/easymon/issues/26
https://github.com/basecamp/easymon/pull/25

Get alerted when CVE-2018-1000855 or the next vulnerability affects your stack