Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-13164— Unauthenticated self-registration in MailerUp allows access to stored email data

Quick assessment

Affected
Mailerup Mailerup
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.

Mario MailerUp是Mario个人开发者的一款邮件服务器软件。 Mario MailerUp 1.0.1之前版本存在授权问题漏洞，该漏洞源于缺少对关键功能的身份验证，可能导致远程未经身份验证的攻击者在注册受限的实例上自行注册有效账户，因为端点应用了AllowAny权限且无邮件验证、验证码或管理员批准，任何以此方式创建的账户均可读取实例存储的所有邮件，导致存储消息完全泄露给任意的未经身份验证的攻击者。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.71% · P52

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
Mailerup Mailerup < 1.0.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-13164

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Unauthenticated self-registration in MailerUp allows access to stored email data
Source: CVE Program / CVE List V5
Vulnerability Description
Missing Authentication for Critical Function (CWE-306) in the RegisterView (apps/accounts/views.py), exposed at POST /api/auth/register/, in MailerUp <1.0.1 allows a remote, unauthenticated attacker to self-register a working account on instances where registration is intended to be restricted, because the endpoint applies the AllowAny permission with no email verification, CAPTCHA, or administrator approval. Any account created this way can read all email stored by the instance, resulting in full disclosure of stored messages to an arbitrary unauthenticated attacker
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Mario MailerUp 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mario MailerUp是Mario个人开发者的一款邮件服务器软件。 Mario MailerUp 1.0.1之前版本存在授权问题漏洞，该漏洞源于缺少对关键功能的身份验证，可能导致远程未经身份验证的攻击者在注册受限的实例上自行注册有效账户，因为端点应用了AllowAny权限且无邮件验证、验证码或管理员批准，任何以此方式创建的账户均可读取实例存储的所有邮件，导致存储消息完全泄露给任意的未经身份验证的攻击者。
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
Mailerup Mailerup 0 ~ 1.0.1 -

II. Public POCs for CVE-2026-13164

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-13164

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-13164 (1)

News Coverage for CVE-2026-13164 (1)

IV. Related Vulnerabilities

Same product: Mailerup
Same vendor: Mailerup
Same weakness: CWE-306

V. Comments for CVE-2026-13164

No comments yet

Leave a comment