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CVE-2020-35590

CRITICAL 9.8 CVSS 3.1
Published
December 21, 2020
Last modified
June 17, 2026
NVD status
Modified
Reported by
cve@mitre.org
Weakness
CWE-307
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

LimitLoginAttempts.php in the limit-login-attempts-reloaded plugin before 2.17.4 for WordPress allows a bypass of (per IP address) rate limits because the X-Forwarded-For header can be forged. When the plugin is configured to accept an arbitrary header for the client source IP address, a malicious user is not limited to perform a brute force attack, because the client IP header accepts any arbitrary string. When randomizing the header input, the login count does not ever reach the maximum allowed retries.

Affected WordPress components

  • Limit Login Attempts Security – Login Security, 2FA, Firewall, Brute Force Prevention Plugin · limit-login-attempts-reloaded
    Confirmed match Active
    Versions not specified
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • n/a n/a — Versions not specified
  • limitloginattempts limit_login_attempts_reloaded — Before 2.17.4

References

  • n4nj0.github.io https://n4nj0.github.io/advisories/wordpress-plugin-limit-login-attempts-reloaded/ Third Party Advisory
  • wordpress.org https://wordpress.org/plugins/limit-login-attempts-reloaded/#developers Product, Third Party Advisory
  • nvd.nist.gov Official NVD record