CVE-2020-17531 json
Deserialization flaw in EOL Tapestry 4.
published 2020-12-08 5 y ago modified 2026-06-17 4 mo ago also GHSA-c566-2grg-mjwg , EUVD-2022-0951
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 10.0%
- EPSS 10.0% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven org.apache.tapestry:tapestry-project 5.0.1
- apache tapestry 5.0.1
Exploit prediction
10.00% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.apache.tapestry:tapestry-project | >=4.0, <5.0.1 |
5.0.1 |
Affected products
- Apache Software Foundation Apache Tapestry
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
lists.apache.org
/thread.html/r700a6aa234dbff0555d4187bdc8274d7e4c0afbf35b9a3457f09ee76%40%3Cusers.tapestry.apache.org%3E
mailing-list, web, vendor-advisory
-
security.netapp.com
/advisory/ntap-20210115-0007/
third-party-advisory
-
openwall.com
/lists/oss-security/2022/12/02/1
mailing-list, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-17531
advisory
-
lists.apache.org
/thread.html/r700a6aa234dbff0555d4187bdc8274d7e4c0afbf35b9a3457f09ee76@%3Cusers.tapestry.apache.org%3E
web
-
security.netapp.com
/advisory/ntap-20210115-0007
web
Sources
- CVE List CVE-2020-17531
- GitHub Advisory GHSA-c566-2grg-mjwg
- NVD CVE-2020-17531
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