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CVE-2021-3964— Authorization Bypass Through User-Controlled Key in elgg/elgg

Quick assessment

Affected
elgg elgg/elgg
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.

Elgg是一套开源社交网络引擎。该产品博客、文件共享、群组等功能。 elgg 存在安全漏洞，该漏洞源于elgg容易受到通过用户控制的密钥的授权绕过。

AI Predicted 8.1 Difficulty: Easy EPSS 0.80% · P55

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token
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I. Basic Information for CVE-2021-3964

Vulnerability Information
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Vulnerability Title
Authorization Bypass Through User-Controlled Key in elgg/elgg
Source: CVE Program / CVE List V5
Vulnerability Description
elgg is vulnerable to Authorization Bypass Through User-Controlled Key
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
elgg 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elgg是一套开源社交网络引擎。该产品博客、文件共享、群组等功能。 elgg 存在安全漏洞，该漏洞源于elgg容易受到通过用户控制的密钥的授权绕过。
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
elgg elgg/elgg unspecified ~ 3.3.22 -

II. Public POCs for CVE-2021-3964

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-3964

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Patches & Fixes for CVE-2021-3964 (1)

Vendor Advisories for CVE-2021-3964 (1)

IV. Related Vulnerabilities

Same product: elgg/elgg
Same vendor: elgg
Same weakness: CWE-639

V. Comments for CVE-2021-3964

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