CVE-2026-13156: medium-severity vulnerability in MailerSend
MailerSend - Official SMTP Integration < 1.0.8 - Settings Deletion and Plugin Deactivation via CSRF
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.4epss 0.1%
from disclosure to weapon1 day
Published on NVDJul 20
1st PoC+1d
The MailerSend WordPress plugin before 1.0.8 does not perform a nonce check on its configuration-delete action (it verifies the manage_options capability but ignores the nonce), so an attacker can trick a logged-in administrator into visiting a crafted page that wipes the MailerSend WordPress plugin before 1.0.8's SMTP configuration and deactivates the MailerSend WordPress plugin before 1.0.8, breaking the site's email delivery.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Affected products
Unknown · MailerSendpublic PoCs found — 2
githubgithub.com/MinhHK68/CVE-2026-13156★ 0cve_referencewpscan.com/vulnerability/595e653d-0904-43cf-8e61-d684599de11b/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.