CVE-2020-27509EPSS p45.7%

CVE-2020-27509CVE-2020-27509

galaxkey / galaxkey

Description

Persistent XSS in Galaxkey Secure Mail Client in Galaxkey up to 5.6.11.5 allows an attacker to perform an account takeover by intercepting the HTTP Post request when sending an email and injecting a specially crafted XSS payload in the 'subject' field. The payload executes when the recipient logs into their mailbox.

Scoring

CVSS 5.4 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS0.58% probability of exploitation · percentile 45.7% · 2026-10-05T12:00:23Z
Last modified2026-07-09
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.