CVE-2019-0195: Apache Tapestry

Critical severity, CVSS 9.8. EPSS: 14% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Tapestry: from 5.4.0, up to and including 5.4.3

Published 2019-09-16. Last modified 2026-06-17.