CVE-2026-88798 Details
Description
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.
A denial-of-service vulnerability has been identified in the Really Simple Security WordPress plugin, affecting versions prior to 9.8.3. The issue arises because the plugin fails to validate client-supplied address values before using them as storage keys in its options. This lack of validation allows unauthenticated attackers to manipulate the option, leading to unbounded growth and causing the site to slow down when handling missing pages.
Users are advised to update the Really Simple Security WordPress plugin to version 9.8.3 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 18, 2026CISA-ADP
Assessed Sep 18, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/e658dcd2-2ff6-4611-a28d-e2482c65be8b/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Really Simple Security | < 9.8.3 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 18, 2026 | CVE Modified | CISA-ADP |
| Sep 18, 2026 | New CVE Received | [email protected] |