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Exploitation reportedNot in CISA KEV yetFix available

CVE-2017-18349

Exploitation reported by one source. First attested on 2023-10-14 by GCVE · shadowserver.

  • Published2018-10-23
  • Fixed in1.2.31
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2018-10-2320:29CVE publishedNVD
  2. 2023-10-1421:36Listed as exploited by GCVEGCVE
  3. 2023-10-1421:36Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-18349?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-18349?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD
fastjson
BranchAffectedFixed in
1.2< 1.2.311.2.31
Alibaba fastjson
BranchAffectedFixed in
1.2< 1.2.251.2.25
Pippo
BranchAffectedFixed in
1.11= 1.11.0no fix published

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update fastjson to 1.2.31

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
2 repositories, unverifiedh0cksr/Fastjson--CVE-2017-18349-Dungsocool/CVE-2017-18349
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-10-23
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-xjrr-xv9m-4pw5

Frequently asked questions

What is CVE-2017-18349?

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.

Is CVE-2017-18349 actively exploited?

Active exploitation of CVE-2017-18349 has not been confirmed. Its EPSS score was 38.8% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-18349?

CVE-2017-18349 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record