CVE-2020-17531

CRITICAL

Apache Tapestry 4 - Deserialization

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-17531. PoCs published by 154802388.

AI-analyzed exploit summary The repository contains a non-functional PoC script with a placeholder print statement and a README.md describing CVE-2020-17530 (not CVE-2020-17531). No exploit code or technical details are provided.

Description

A Java Serialization vulnerability was found in Apache Tapestry 4. Apache Tapestry 4 will attempt to deserialize the "sp" parameter even before invoking the page's validate method, leading to deserialization without authentication. Apache Tapestry 4 reached end of life in 2008 and no update to address this issue will be released. Apache Tapestry 5 versions are not vulnerable to this issue. Users of Apache Tapestry 4 should upgrade to the latest Apache Tapestry 5 version.

Exploits (1)

nomisec STUB
by 154802388 · poc
https://github.com/154802388/CVE-2020-17531

The repository contains a non-functional PoC script with a placeholder print statement and a README.md describing CVE-2020-17530 (not CVE-2020-17531). No exploit code or technical details are provided.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: Apache Struts2 (incorrectly referenced as CVE-2020-17531)
No auth needed
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 9.8
EPSS 0.6923
EPSS Percentile 98.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-502
Status published
Products (2)
apache/tapestry 4.0.0 - 5.0.1
org.apache.tapestry/tapestry-project 4.0 - 5.0.1Maven
Published Dec 08, 2020
Tracked Since Feb 18, 2026