CVE-2026-57813

WordPress MailOptin plugin <= 1.2.77.3 - Privilege Escalation vulnerability

Incorrect Privilege Assignment vulnerability in properfraction MailOptin mailoptin allows Privilege Escalation.This issue affects MailOptin: from n/a through <= 1.2.77.3.

We have discovered 5,894 live websites that are affected by CVE-2026-57813.

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Affected Software

Product  MailOptin
Category Wordpress Themes
Vulnerable Domains5,894 live websites (86% of MailOptin install base)
Vulnerable Versions
  • from 0 through 1.2.77.3
Vulnerable Versions Count127 versions ( 73% of all versions)



Details

  • Published - Jul 13, 2026
  • Updated - Jul 13, 2026

Credits

  • qdtad | Patchstack Bug Bounty Program (finder)

Website Distribution by Country

Number of websites using CVE-2026-57813
United States2,511 websites


France529 websites
Germany485 websites
GB289 websites
Italy213 websites
Canada153 websites
Netherlands128 websites
Spain111 websites
Australia96 websites
Brazil93 websites

Website Distribution by TLD

Number of websites using CVE-2026-57813
.com3,019 websites
.org489 websites
.de259 websites
.fr249 websites
.it155 websites
.co.uk144 websites
.net118 websites
.nl103 websites
.com.au89 websites
.com.br82 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-57813

Top websites that are affected by CVE-2026-57813. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
***************.com United States**,***
*****.com France**,***
**********.com United States**,***
**********.com United States**,***
***********.net United States**,***
********.org United States**,***
*****.com United States***,***
**********.com United States***,***
****.org United States***,***
****************.org United States***,***
See full domain list

FAQ

A total of 5,894 websites have been identified as vulnerable to CVE-2026-57813, based on global website indexing conducted by WebTechSurvey.
The MailOptin is affected by the CVE-2026-57813 vulnerability.
MailOptin versions up to and including 1.2.77.3 are vulnerable to CVE-2026-57813.