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CVE-2021-3734— Improper Restriction of Rendered UI Layers or Frames in yourls/yourls

Quick assessment

Affected
yourls yourls/yourls
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.

YOURLS是一套基于PHP的开源短链接平台。 yourls 存在安全漏洞，该漏洞源于yourls容易受到渲染UI层或帧的不当限制。 攻击者可利用该漏洞导致在应用程序内执行操作。

AI Predicted 6.1 Difficulty: Easy EPSS 0.40% · P33

Possible ATT&CK Techniques 1 AI

T1021 · Remote Services
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I. Basic Information for CVE-2021-3734

Vulnerability Information
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Vulnerability Title
Improper Restriction of Rendered UI Layers or Frames in yourls/yourls
Source: CVE Program / CVE List V5
Vulnerability Description
yourls is vulnerable to Improper Restriction of Rendered UI Layers or Frames
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不当限制渲染UI层或帧
Source: CVE Program / CVE List V5
Vulnerability Title
yourls 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
YOURLS是一套基于PHP的开源短链接平台。 yourls 存在安全漏洞，该漏洞源于yourls容易受到渲染UI层或帧的不当限制。 攻击者可利用该漏洞导致在应用程序内执行操作。
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
yourls yourls/yourls unspecified ~ 1.8.1 -

II. Public POCs for CVE-2021-3734

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-3734

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Patches & Fixes for CVE-2021-3734 (1)

Vendor Advisories for CVE-2021-3734 (1)

IV. Related Vulnerabilities

Same product: yourls/yourls
Same vendor: yourls
Same weakness: CWE-1021

V. Comments for CVE-2021-3734

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