WordPress Plugin Vulnerabilities
Really Simple Security (Free) < 9.8.3 - Unauthenticated Unbounded Option Growth via Spoofed Client IP Header
Description
The plugin 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.
Proof of Concept
Affects Plugins
Fixed in 9.8.3 References
CVE
Miscellaneous
Original Researcher
Naoki Kawahigashi
Submitter
Naoki Kawahigashi
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2026-09-16 (about 2 days ago)
Added
2026-09-16 (about 1 day ago)
Last Updated
2026-09-16 (about 1 day ago)
WPScan 