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.
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Fixes

Solution

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Workaround

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History

Fri, 18 Sep 2026 06:15:00 +0000

Type Values Removed Values Added
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.
Title Really Simple Security (Free) < 9.8.3 - Unauthenticated Unbounded Option Growth via Spoofed Client IP Header
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-09-18T06:00:15.729Z

Reserved: 2026-09-10T08:22:07.339Z

Link: CVE-2026-88798

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-18T06:16:41.053

Modified: 2026-09-18T06:16:41.053

Link: CVE-2026-88798

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.