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CVE-2021-29451— Missing validation of JWT signature in `ManyDesigns/Portofino`

Quick assessment

Affected
ManyDesigns Portofino
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.

Alessio Stalla Portofino是Alessio Stalla开源的一个应用软件。用于构建模型驱动的REST API和Web应用程序的低代码工具。 Portofino version 5.2.1 存在安全漏洞，该漏洞源于。Portofino是一个开源的web开发框架。在5.2.1版本之前，Portofino没有正确地验证JSON Web令牌的签名。这允许锻造一个有效的JWT。该问题将在即将发布的5.2.1版本中修复。

CVSS 9.1 · Critical EPSS 0.95% · P60

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-29451

Vulnerability Information
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Vulnerability Title
Missing validation of JWT signature in `ManyDesigns/Portofino`
Source: CVE Program / CVE List V5
Vulnerability Description
Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT. The issue will be patched in the upcoming 5.2.1 release.
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:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Alessio Stalla Portofino 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Alessio Stalla Portofino是Alessio Stalla开源的一个应用软件。用于构建模型驱动的REST API和Web应用程序的低代码工具。 Portofino version 5.2.1 存在安全漏洞，该漏洞源于。Portofino是一个开源的web开发框架。在5.2.1版本之前，Portofino没有正确地验证JSON Web令牌的签名。这允许锻造一个有效的JWT。该问题将在即将发布的5.2.1版本中修复。
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
ManyDesigns Portofino >= 5.0.0, < 5.2.1 -

II. Public POCs for CVE-2021-29451

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III. Intelligence Information for CVE-2021-29451

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Patches & Fixes for CVE-2021-29451 (1)

Vendor Advisories for CVE-2021-29451 (1)

Other References for CVE-2021-29451 (1)

IV. Related Vulnerabilities

Same product: Portofino
Same vendor: ManyDesigns
Same weakness: CWE-347

V. Comments for CVE-2021-29451

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