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CVE 2013-2153

The XML digital signature functionality (xsec/dsig/DSIGReference.cpp) in Apache Santuario XML Security for C++ (aka xml-security-c) before 1.7.1 allows context-dependent attackers to reuse signatures and spoof arbitrary content via crafted Reference elements in the Signature, aka "XML Signature Bypass issue."

See the CVE page on Mitre.org for more details.