TCPDF version <=6.6.5 is vulnerable to ReDoS (Regular Expression Denial of Service) if parsing an untrusted HTML page with a crafted color.

An issue was discovered in TCPDF before 6.8.0. The Error function lacks an htmlspecialchars call for the error message.

An issue was discovered in TCPDF before 6.8.0. unserializeTCPDFtag uses != (aka loose comparison) and does not use a constant-time function to compare TCPDF tag hashes.

An issue was discovered in TCPDF before 6.8.0. setSVGStyles does not sanitize the SVG font-family attribute.

Local File Inclusion (LFI) vulnerability has been discovered in TCPDF 6.7.5. This vulnerability enables a user to read arbitrary files from the server's file system through <img> src tag, potentially exposing sensitive information.

TCPDF before 6.7.4 mishandles calls that use HTML syntax.

TCPDF version 6.6.5 and before is vulnerable to ReDoS (Regular Expression Denial of Service) if parsing an untrusted SVG file.

An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.

tcpdf before 6.2.0 uploads files from the server generating PDF-files to an external FTP.