Is CVE-2020-10539 actively exploited?

No active exploitation of CVE-2020-10539 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-10539 be exploited remotely?

Yes. CVE-2020-10539 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-10539?

CVE-2020-10539 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-10539

CRITICAL

CVE-2020-10539

CWE-287Published: February 5, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered in Epikur before 20.1.1. The Epikur server contains the checkPasswort() function that, upon user login, checks the submitted password against the user password's MD5 hash stored in the database. It is also compared to a second MD5 hash, which is the same for every user (aka a "Backdoor Password" of 3p1kursupport). If the submitted password matches either one, access is granted.

NVD Source

Technical Analysis

CVE-2020-10539 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.