Newsletters < 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-16268
StatePUBLISHED
AssignerWPScan
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 07:16:28 UTC
Updated2026-08-06 15:16:44 UTC
DescriptionThe Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from ADP

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

EPSS: 0.001930000 probability, percentile 0.091590000 (date 2026-08-09)

Problem Types: CWE-918 | CWE-918 Server-Side Request Forgery (SSRF) | CWE-918 CWE-918 Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Unknown Newsletters affected 4.16 semver Not specified

References

ReferenceSourceLinkTags
wpscan.com/vulnerability/65612dd4-83d8-40c5-8e12-862e9b5f940b [email protected] wpscan.com
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: Yaswanth Reddy Sunkara (en)

CNA: WPScan (en)

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