Is CVE-2026-18356 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-18356 being exploited in the wild.

How severe is CVE-2026-18356?

Low severity, with a CVSS score of 3.7, published 21 August 2026.

Which products and versions are affected?

WebFactory Ltd Limit Login Attempts Reloaded before 3.3.5.

Is there a fix for CVE-2026-18356?

A patch was published on 2026-08-21: Version 3.3.5 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-18356 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-18356?

Check whether you run WebFactory Ltd Limit Login Attempts Reloaded at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-18356: Limit Login Attempts Reloaded username denylist bypass via case variant and email

CVE-2026-18356 · Severity: low · CVSS 3.7 · Published 2026-08-21

Limit Login Attempts Reloaded is a WordPress plugin that blocks login attempts from specific usernames to prevent unauthorized access to admin accounts. A flaw in the plugin's security checks allows an attacker who already knows the password for a denylisted account to bypass the login block by using a different case variant of the username or by logging in with the account's email address instead. This defeats the administrator's intended protection without requiring any knowledge of additional credentials.

Vendors: WebFactory Ltd.

Quick answers

Is CVE-2026-18356 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-18356 being exploited in the wild.
How severe is CVE-2026-18356?: Low severity, with a CVSS score of 3.7, published 21 August 2026.
Which products and versions are affected?: WebFactory Ltd Limit Login Attempts Reloaded before 3.3.5.
Is there a fix for CVE-2026-18356?: A patch was published on 2026-08-21: Version 3.3.5 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-18356 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-18356?: Check whether you run WebFactory Ltd Limit Login Attempts Reloaded at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a logic flaw in the username denylist comparison mechanism. The plugin fails to perform case-insensitive comparisons when checking logins against the denylist, and does not account for authentication via the associated email address. An attacker with valid credentials for a denylisted account can bypass the block by submitting "Victimadmin" instead of "victimadmin" (single-site installations) or by submitting the account's email address (both single-site and multisite). The attack requires pre-existing knowledge of the account password, meaning it defeats the intended administrative control rather than granting unauthorized access. The flaw was patched in version 3.3.5 with case-insensitive comparison and email-based filtering logic.

Affected products

WebFactory Ltd Limit Login Attempts Reloaded before 3.3.5

Timeline

2026-08-17: disclosed
2026-08-21: advisory
2026-08-21: patched: Version 3.3.5 released

References

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