Newsletter Manager <= 1.5.1 - Insecure Deserialization

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2020-36727
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-06-07 02:15:12 UTC
Updated2026-04-08 19:17:36 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.010670000 probability, percentile 0.776920000 (date 2026-04-09)

Problem Types: CWE-502 | CWE-502 CWE-502 Deserialization of Untrusted Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Xyzscripts Newsletter Manager All All - All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA F1logic Newsletter Manager affected 1.5.1 semver Not specified

References

ReferenceSourceLinkTags
Newsletter Manager <= 1.5.1 - Insecure Deserialization af854a3a-2127-422b-91ae-364da2661108 www.wordfence.com Third Party Advisory
Insecure deserialization vulnerability in WordPress Newsletter Manager plugin (unpatched). – NinTechNet af854a3a-2127-422b-91ae-364da2661108 blog.nintechnet.com Exploit
Newsletter Manager <= 1.5.1 - Unauthenticated Insecure Deserialisation Security Vulnerability af854a3a-2127-422b-91ae-364da2661108 wpscan.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Jerome Bruandet (en)

Additional Advisory Data

SourceTimeEvent
CNA2020-12-29T00:00:00.000ZDisclosed
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