Threat intelligence

Newsletters <= 4.13 - Missing Authorization

CVE-2026-54840 · newsletters-lite

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Newsletters Lite at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Newsletters <= 4.13 - Missing Authorization
Affected software: newsletters-lite(Plugin)
Affected versions: ≤ 4.13
Authentication: Not specified in feed title — see source advisory
Vulnerability type: Other
CVE: CVE-2026-54840
Published: 18 June 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: This advisory describes a other issue in the affected software. Review the source advisory and your installed version to assess exposure.
Source: Data imported from Wordfence Intelligence (advisory b6bb9df2-cf6e-4357-b75c-afdab55f90d4). Methodology and redistribution notes

Check whether your installed version is affected

SiteRespond Defence matches your installed Newsletters Lite version against this catalog when the Defence plugin is connected to your WordPress site.

Start SiteRespond Defence for WordPress — £29.99/monthScan your website

All Newsletters Lite advisoriesBack to catalog