Really Simple Security (Free) < 9.8.3 - Unauthenticated Unbounded Option Growth via Spoofed Client IP Header

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-88798
StatePUBLISHED
AssignerWPScan
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 06:16:41 UTC
Updated2026-09-18 06:16:41 UTC
DescriptionThe Really Simple Security WordPress plugin before 9.8.3 does not validate a client-supplied address value before using it as a storage key in one of its own options, allowing unauthenticated attackers to grow that option without bound and to slow the site's handling of missing pages.

Risk And Classification

Problem Types: CWE-400 Uncontrolled Resource Consumption

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Unknown Really Simple Security affected 8.1.6 9.8.3 semver Not specified

References

ReferenceSourceLinkTags
wpscan.com/vulnerability/e658dcd2-2ff6-4611-a28d-e2482c65be8b [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: Naoki Kawahigashi (en)

CNA: WPScan (en)

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