peter bassill · operator
$ cve CVE-2020-17531 JSON

CVE-2020-17531

9.8
CRITICAL · CVSS 3.1 · EPSS 10% (pctl 95)

In your normal cycle

Critical by CVSS (9.8), but no sign of active exploitation.

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.

Scoring

CVSS9.8 (CRITICAL, v3.1)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS10% — more likely to be exploited than 95% of all CVEs
WeaknessCWE-502
On CISA KEVno
Public exploitnone known
Published2020-12-08
Last modified2026-06-17

Affected (1)

VendorProduct
apachetapestry

References

→ the Explorer  ·  watch your stack  ·  NVD