CVE•Published 2023-06-07•Modified 2026-04-08•1 article on news•6 live references•NVD data

CVE-2020-36727Xyzscripts · Newsletter_manager

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 21% of all CVEs

Weaknesses (CWE)

CWE-502Deserialization of Untrusted Data

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.

Timeline

Published 2023-06-07

Modified 2026-04-08

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2020-36727

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/newsletter-manager/"

Matches any site loading the "newsletter-manager" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Xyzscripts Newsletter Manager"

All exposed Xyzscripts Newsletter Manager instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Newsletter Manager"

HTTP body or banner mentions "Newsletter Manager" — catches deploys Shodan didn't identify as a product.