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Vulnerability record · CVE-2017-18349 · published 23 October 2018

CVE-2017-18349: Alibaba fastjson improper input validation vulnerability

Alibaba · Fastjson

parseObject in Fastjson before 1.2.25, as used in FastjsonEngine in Pippo 1.11.0 and other products, allows remote attackers to execute arbitrary code via a crafted JSON request, as demonstrated by a crafted rmi:// URI in the dataSourceName field of HTTP POST data to the Pippo /json URI, which is mishandled in AjaxApplication.java.

9.8 CVSS 3.0 Critical EPSS 39% · top 1.4% CWE-20 · Improper input validation
9.8CVSS 3.0 base score, v2 10.0
39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

parseObject in Fastjson before 1.2.25, as used in FastjsonEngine in Pippo 1.11.0 and other products, allows remote attackers to execute arbitrary code via a crafted JSON request, as demonstrated by a crafted rmi:// URI in the dataSourceName field of HTTP POST data to the Pippo /json URI, which is mishandled in AjaxApplication.java.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://fortiguard.com/encyclopedia/ips/44059 MitigationThird Party Advisory
https://github.com/alibaba/fastjson/wiki/security_update_20170315 MitigationThird Party Advisory
https://github.com/pippo-java/pippo/issues/466 ExploitThird Party Advisory
https://fortiguard.com/encyclopedia/ips/44059 MitigationThird Party Advisory
https://github.com/alibaba/fastjson/wiki/security_update_20170315 MitigationThird Party Advisory
https://github.com/pippo-java/pippo/issues/466 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-18349), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.