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CVE-2026-13156— MailerSend - Official SMTP Integration < 1.0.8 - Settings Deletion and Plugin Deactivation via CSRF

Quick assessment

Affected
Unknown MailerSend
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 MailerSend是WordPress基金会的一款邮件发送服务平台。 WordPress MailerSend 1.0.8之前版本存在跨站请求伪造漏洞，该漏洞源于插件在配置删除操作中未执行nonce检查（仅验证manage_options能力而忽略nonce），可能导致攻击者诱骗已登录管理员访问特制页面，清除MailerSend的SMTP配置并停用插件，影响网站的电子邮件发送。

AI Predicted 5.4 Difficulty: Easy EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1134 · Access Token Manipulation

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown MailerSend < 1.0.8 affected
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I. Basic Information for CVE-2026-13156

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
MailerSend - Official SMTP Integration < 1.0.8 - Settings Deletion and Plugin Deactivation via CSRF
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress MailerSend 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress MailerSend是WordPress基金会的一款邮件发送服务平台。 WordPress MailerSend 1.0.8之前版本存在跨站请求伪造漏洞，该漏洞源于插件在配置删除操作中未执行nonce检查（仅验证manage_options能力而忽略nonce），可能导致攻击者诱骗已登录管理员访问特制页面，清除MailerSend的SMTP配置并停用插件，影响网站的电子邮件发送。
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
Unknown MailerSend 0 ~ 1.0.8 -

II. Public POCs for CVE-2026-13156

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III. Intelligence Information for CVE-2026-13156

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Vendor Advisories for CVE-2026-13156 (1)

Same Patch Batch · Unknown · 2026-07-20 · 18 CVEs total

CVE-2026-12972 PayPlus Payment Gateway < 8.2.2 - Unauthenticated Order Payment Metadata Tampering
CVE-2026-8825 Elementor < 4.1.4 - Contributor+ Sensitive Information Disclosure via REST API
CVE-2026-13147 Kirki < 6.0.12 - Unauthenticated Server-Side Request Forgery via kirki_get_apis
CVE-2026-13142 Passwordless Login by VentraConnect < 1.4.1 - Unauthenticated Account Takeover via Email O
CVE-2026-13432 ThumbPress < 6.2.2 - Subscriber+ Plugin Deactivation
CVE-2026-9833 Tag Groups < 2.2.0 - Reflected XSS via 'tag_groups_task' Parameter
CVE-2026-12898 All-in-One WP Migration and Backup < 7.106 - Unauthenticated Arbitrary-Location Log File W
CVE-2026-12970 LearnPress < 4.4.1 - Reflected XSS via c_search
CVE-2026-12973 PayPlus Payment Gateway < 8.2.2 - Unauthenticated Order Key Disclosure and Order Status Mo
CVE-2026-11349 Modern Events Calendar (Lite & Pro) < 7.34.0 - Unauthenticated SQL Injection via mec_list_
CVE-2026-12724 Kirki < 6.0.12 - Unauthenticated HTML Injection in Password Reset Email via kirki-forgot-p
CVE-2026-12723 Kirki < 6.0.12 - Unauthenticated Arbitrary Comment Modification and Moderation Bypass via
CVE-2026-12592 SlimStat Analytics < 5.5.0 - Unauthenticated Stored XSS via CF-IPCountry Header
CVE-2026-11868 WP Travel < 11.7.1 - Unauthenticated Arbitrary Booking Cancellation
CVE-2026-10081 Unlimited Elements for Elementor < 2.0.11 - Unauthenticated Stored XSS via Google Reviews
CVE-2026-10724 Reviews Feed < 2.6.5 - Unauthenticated Stored Arbitrary Shortcode Execution via Google Rev
CVE-2026-10755 All in One SEO < 4.9.9 – Contributor+ Incorrect Authorization via AI Integration

IV. Related Vulnerabilities

Same vendor: Unknown

V. Comments for CVE-2026-13156

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