---
id: CVE-2026-88798
title: >-
  The 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 …
summary: >-
  The 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 …
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-400
product: Really Simple Security
affected:
  - really_simple_security >= 8.1.6 < 9.8.3
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:08:32.830'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88798'
references:
  - url: 'https://wpscan.com/vulnerability/e658dcd2-2ff6-4611-a28d-e2482c65be8b/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.0042
epssPercentile: 0.33706
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T11:02:21.267727Z'
ingestedAt: '2026-09-18T06:36:37.986Z'
---

## Overview

The 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.