Manipulating classpath asset file URLs, an attacker could guess the path to a known file in the classpath and have it downloaded. If the attacker found the file with the value of the tapestry.hmac-passphrase configuration symbol, most probably the webapp's AppModule class, the value of this symbol could be used to craft a Java deserialization attack, thus running malicious injected Java code. The vector would be the t:formdata parameter from the Form component.
{
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:apache:tapestry:*:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"range": [
{
"introduced": "5.4.0"
},
{
"last_affected": "5.4.3"
}
],
"source": "CPE_RANGE"
}
],
"vendor_product": "apache:tapestry"
}
]
}