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I. Basic Information for CVE-2021-3902
Vulnerability Information

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Vulnerability Title
Improper Restriction of XML External Entity Reference in dompdf/dompdf
Source: NVD (National Vulnerability Database)
Vulnerability Description
An improper restriction of external entities (XXE) vulnerability in dompdf/dompdf's SVG parser allows for Server-Side Request Forgery (SSRF) and deserialization attacks. This issue affects all versions prior to 2.0.0. The vulnerability can be exploited even if the isRemoteEnabled option is set to false. It allows attackers to perform SSRF, disclose internal image files, and cause PHAR deserialization attacks.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Dompdf 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dompdf是Dompdf开源的一个 HTML 到 PDF 的转换器。 Dompdf 2.0.0之前版本存在代码问题漏洞,该漏洞源于存在对外部实体(XXE)漏洞的不当限制,可能导致服务器端请求伪造(SSRF)和反序列化攻击。
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
VendorProductAffected VersionsCPESubscribe
dompdfdompdf/dompdf unspecified ~ 2.0.0 -
II. Public POCs for CVE-2021-3902
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III. Intelligence Information for CVE-2021-3902
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