Is CVE-2020-36727 actively exploited?

No active exploitation of CVE-2020-36727 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-36727 be exploited remotely?

Yes. CVE-2020-36727 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-36727?

CVE-2020-36727 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-36727

CWE-502Published: June 7, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The Newsletter Manager plugin for WordPress is vulnerable to insecure deserialization in versions up to, and including, 1.5.1. This is due to unsanitized input from the 'customFieldsDetails' parameter being passed through a deserialization function. This potentially makes it possible for unauthenticated attackers to inject a serialized PHP object.

NVD Source

Risk Analysis

The Newsletter Manager plugin for WordPress is vulnerable to insecure deserialization, which could allow unauthenticated attackers to inject malicious PHP objects. This critical 9.8-rated flaw could lead to full site compromise.

There is no known public exploit for this vulnerability, and it is not in the CISA KEV catalog. It is remotely exploitable with low attack complexity.

Recommended Action

Users should update the Newsletter Manager plugin to a version beyond 1.5.1 to ensure input is properly sanitized before deserialization.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2020-36727 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-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.