CVE-2026-88798CWE-400denial-of-service

CVE-2026-88798

Medium · published September 18, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00420 · 35.3th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-09-18T10:16Z
References (1)
https://wpscan.com/vulnerability/e658dcd2-2ff6-4611-a28d-e2482c65be8b/ · [email protected]
EPSS history
Timeline
  • 19 SEP 03:54Z
    EPSS moved — → 0%
    epss
  • 18 SEP 06:00Z
    Really Simple Security (Free) < 9.8.3 - Unauthenticated Unbounded Option Growth via Spoofed Client IP Header
    cvelistv5