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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
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| idno/known | composer | <= 1.3.1 |
The vulnerability stems from improper SVG validation in isSVG(). The function's original implementation (pre-patch) only checked for '.svg' file extensions rather than validating actual content. The researcher blog shows attackers could upload SVG files containing <script> tags or PHP code. The GitHub commit adds isFileFreeFromScriptTags() to address this, confirming the lack of content validation in the original isSVG() implementation. CWE-79 classification and CVE description both point to improper input neutralization in web content generation via SVG processing.
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