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CVE-2026-57813— WordPress MailOptin plugin <= 1.2.77.3 - Privilege Escalation vulnerability

Quick assessment

Affected
properfraction MailOptin
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress MailOptin是WordPress基金会的一个通过表单建立邮件订阅列表的插件。 WordPress MailOptin 1.2.77.3及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于权限分配不当，可能导致权限提升。

CVSS 9.8 · Critical EPSS 0.48% · P39

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 1

VendorProduct Version RangeStatus
properfraction MailOptin ≤ 1.2.77.3 affected
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I. Basic Information for CVE-2026-57813

Vulnerability Information
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Vulnerability Title
WordPress MailOptin plugin <= 1.2.77.3 - Privilege Escalation vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect Privilege Assignment vulnerability in properfraction MailOptin mailoptin allows Privilege Escalation.This issue affects MailOptin: from n/a through <= 1.2.77.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权授予不正确
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress MailOptin 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress MailOptin是WordPress基金会的一个通过表单建立邮件订阅列表的插件。 WordPress MailOptin 1.2.77.3及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于权限分配不当，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
properfraction MailOptin 0 ~ 1.2.77.3 -

II. Public POCs for CVE-2026-57813

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III. Intelligence Information for CVE-2026-57813

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Patches & Fixes for CVE-2026-57813 (1)

IV. Related Vulnerabilities

Same product: MailOptin
Same vendor: properfraction
Same weakness: CWE-266

V. Comments for CVE-2026-57813

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