High severity · published Jun 17, 2026
CVE-2026-54804
WordPress Melhor Envio plugin <= 2.16.3 - Broken Authentication vulnerability
7.6
CVSS
0.3%
EPSS
No
On KEV
Description
Subscriber Broken Authentication in Melhor Envio <= 2.16.3 versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Melhor Envio · melhorenvio
through 2.16.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54804
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54804
patchstack.com
https://patchstack.com/database/wordpress/plugin/melhor-envio-cotacao/vulnerability/wordpress-melhor-envio-plugin-2-16-3-broken-authentication-vulnerability?_s_id=cve
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