Is CVE-2020-5577 actively exploited?

No active exploitation of CVE-2020-5577 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-5577 be exploited remotely?

Yes. CVE-2020-5577 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-5577?

CVE-2020-5577 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2020-5577

CWE-434Published: May 14, 2020· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Movable Type series (Movable Type 7 r.4606 (7.2.1) and earlier (Movable Type 7), Movable Type Advanced 7 r.4606 (7.2.1) and earlier (Movable Type Advanced 7), Movable Type for AWS 7 r.4606 (7.2.1) and earlier (Movable Type for AWS 7), Movable Type 6.5.3 and earlier (Movable Type 6.5), Movable Type Advanced 6.5.3 and earlier (Movable Type Advanced 6.5), Movable Type 6.3.11 and earlier (Movable Type 6.3), Movable Type Advanced 6.3.11 and earlier (Movable Type 6.3), Movable Type Premium 1.29 and earlier, and Movable Type Premium Advanced 1.29 and earlier) allow remote authenticated attackers to upload arbitrary files and execute a php script via unspecified vectors.

NVD Source

Technical Analysis

CVE-2020-5577 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 8.8.