{"id":"CVE-2026-88798","aliases":["EUVD-2026-82676","GHSA-43h4-q789-j3pr"],"status":"published","title":"Really Simple Security (Free) \u003c 9.8.3 - Unauthenticated Unbounded Option Growth via Spoofed Client IP Header","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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.0042,"percentile":0.36664,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2026-09-18T06:00:15Z","modified":"2026-09-18T19:08:32Z","products":[{"vendor":"unknown","product":"really simple security"}],"references":[{"url":"https://wpscan.com/vulnerability/e658dcd2-2ff6-4611-a28d-e2482c65be8b/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88798"},{"url":"https://wpscan.com/vulnerability/e658dcd2-2ff6-4611-a28d-e2482c65be8b"},{"url":"https://github.com/advisories/GHSA-43h4-q789-j3pr"}],"sources":{"cve":[{"id":"CVE-2026-88798","title":"Really Simple Security (Free) \u003c 9.8.3 - Unauthenticated Unbounded Option Growth via Spoofed Client IP Header","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.","status":"published","published":"2026-09-18T06:00:15.729Z","modified":"2026-09-18T11:09:13.043Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"adp"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T13:41:53.237769Z"}],"euvd":[{"id":"EUVD-2026-82676","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.","status":"published","published":"2026-09-18T06:00:15Z","modified":"2026-09-18T11:09:13Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T17:28:09.240281Z"}],"ghsa":[{"id":"GHSA-43h4-q789-j3pr","title":"The Really Simple Security  WordPress plugin before 9.8.3 does not validate a client-supplied...","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.","status":"published","published":"2026-09-18T06:31:30Z","modified":"2026-09-18T12:32:21Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:12:10.152672Z"}],"nvd":[{"id":"CVE-2026-88798","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.","status":"published","published":"2026-09-18T06:16:41.053Z","modified":"2026-09-18T19:08:32.83Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:12:49.70655Z"}]}}