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CVE-2025-47781— Rallly Insufficient Password Login Token Entropy Leads to Account Takeover

Quick assessment

Affected
lukevella rallly
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rallly是Luke Vella个人开发者的一款日程安排和协作工具，旨在更轻松地组织活动和会议。 Rallly 3.22.1及之前版本存在安全漏洞，该漏洞源于6位数字令牌熵值过低且无暴力破解防护，可能导致账户接管。

CVSS 9.8 · Critical EPSS 0.63% · P50

Possible ATT&CK Techniques 1 AI

T1110.003 · Password Spraying
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I. Basic Information for CVE-2025-47781

Vulnerability Information
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Vulnerability Title
Rallly Insufficient Password Login Token Entropy Leads to Account Takeover
Source: CVE Program / CVE List V5
Vulnerability Description
Rallly is an open-source scheduling and collaboration tool. Versions up to and including 3.22.1 of the application features token based authentication. When a user attempts to login to the application, they insert their email and a 6 digit code is sent to their email address to complete the authentication. A token that consists of 6 digits only presents weak entropy however and when coupled with no token brute force protection, makes it possible for an unauthenticated attacker with knowledge of a valid email address to successfully brute force the token within 15 minutes (token expiration time) and take over the account associated with the targeted email address. All users on the Rallly applications are impacted. As long as an attacker knows the user's email address they used to register on the app, they can systematically take over any user account. For the authentication mechanism to be safe, the token would need to be assigned a complex high entropy value that cannot be bruteforced within reasonable time, and ideally rate limiting the /api/auth/callback/email endpoint to further make brute force attempts unreasonable within the 15 minutes time. As of time of publication, no patched versions are available.
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
信息熵不充分
Source: CVE Program / CVE List V5
Vulnerability Title
Rallly 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rallly是Luke Vella个人开发者的一款日程安排和协作工具，旨在更轻松地组织活动和会议。 Rallly 3.22.1及之前版本存在安全漏洞，该漏洞源于6位数字令牌熵值过低且无暴力破解防护，可能导致账户接管。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
lukevella rallly <= 3.11.2 -

II. Public POCs for CVE-2025-47781

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7227 chars
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III. Intelligence Information for CVE-2025-47781

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IV. Related Vulnerabilities

Same product: rallly
Same vendor: lukevella
Same weakness: CWE-331