TI-2020-18898 Aliases CVE-2020-36727 GHSA-xj95-mhv8-mh4r

Newsletter Manager <= 1.5.1 - Insecure Deserialization

MEDIUM 52CWE-502Published 2023-06-07 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01615 76th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
f1logic	Newsletter Manager	up to 1.5.1	—	No fix listed	CNA

Newsletter Manager Vendorf1logic Affected up to 1.5.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:xyzscripts:newsletter_manager:::-::-:wordpress::*	up to 1.5.1	Vulnerable	XYZScripts

cpe:2.3:a:xyzscripts:newsletter_manager:*:*:-:*:-:wordpress:*:* Versions up to 1.5.1 Vulnerable ·XYZScripts

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-36727
2026-10-03 Alias added: GHSA-xj95-mhv8-mh4r

References

Exploit 1

https://blog.nintechnet.com/insecure-deserialization-vulnerability-in-wordpress-newsletter-manager-plugin-unpatched/

Advisory 2

TI-2024-11929 Custom Field Manager <= 1.0 - Reflected XSS Vulnerability CVSS 3.1MEDIUM 6.1
TI-2024-06876 Insert PHP Code Snippet <= 1.3.6 - Cross-Site Request Forgery to Code Snippet Activate/Deactivate/Deletion CVSS 3.1MEDIUM 6.5
TI-2024-02132 Contact Form Manager <= 1.6.1 - Authenticated (Contributor+) Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.4
TI-2025-11076 WP Twitter Auto Publish <= 1.7.4 - Reflected Cross-Site Scripting via PostMessage CVSS 3.1MEDIUM 6.1
TI-2025-11074 WP to LinkedIn Auto Publish <= 1.9.8 - Reflected Cross-Site Scripting via PostMessage CVSS 3.1MEDIUM 6.1
TI-2025-11073 Social Media Auto Publish <= 3.6.5 - Reflected Cross-Site Scripting via PostMessage CVSS 3.1MEDIUM 6.1

See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences