7.5
HIGH CVSS 3.1
CVE-2021-31684
JSON Smart JSONOverflow Denial of Service Vulnerability
Description

A vulnerability was discovered in the indexOf function of JSONParserByteArray in JSON Smart versions 1.3 and 2.4 which causes a denial of service (DOS) via a crafted web request.

INFO

Published Date :

June 1, 2021, 8:15 p.m.

Last Modified :

Nov. 21, 2024, 6:06 a.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2021-31684 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Json-smart_project json-smart-v1
2 Json-smart_project json-smart-v2
1 Oracle utilities_framework
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.1 HIGH [email protected]
Solution
This vulnerability can be remediated by upgrading the affected JSON-Smart library and associated products.
  • Upgrade the libjson-smart-java packages.
  • Upgrade to the latest versions of affected products.
Public PoC/Exploit Available at Github

CVE-2021-31684 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-31684 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-31684 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

HTML JavaScript CSS

Updated: 1 month, 1 week ago
0 stars 0 fork 0 watcher
Born at : July 14, 2025, 4:31 p.m. This repo has been linked 17 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-31684 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-31684 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://github.com/netplex/json-smart-v1/issues/10
    Added Reference https://github.com/netplex/json-smart-v1/pull/11
    Added Reference https://github.com/netplex/json-smart-v2/issues/67
    Added Reference https://github.com/netplex/json-smart-v2/pull/68
    Added Reference https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html
    Added Reference https://security.netapp.com/advisory/ntap-20240621-0006/
    Added Reference https://www.oracle.com/security-alerts/cpujan2022.html
    Added Reference https://www.oracle.com/security-alerts/cpujul2022.html
  • CVE Modified by [email protected]

    Jun. 21, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://security.netapp.com/advisory/ntap-20240621-0006/ [No types assigned]
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Mar. 31, 2023

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 25, 2022

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/security-alerts/cpujul2022.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Mar. 01, 2022

    Action Type Old Value New Value
    Changed Reference Type https://www.oracle.com/security-alerts/cpujan2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:oracle:utilities_framework:4.4.0.0.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:utilities_framework:4.4.0.2.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:utilities_framework:4.4.0.3.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 07, 2022

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/security-alerts/cpujan2022.html [No Types Assigned]
  • Reanalysis by [email protected]

    Nov. 15, 2021

    Action Type Old Value New Value
    Changed Reference Type https://github.com/netplex/json-smart-v1/issues/10 Third Party Advisory https://github.com/netplex/json-smart-v1/issues/10 Issue Tracking, Third Party Advisory
    Changed Reference Type https://github.com/netplex/json-smart-v2/issues/67 Exploit, Third Party Advisory https://github.com/netplex/json-smart-v2/issues/67 Exploit, Issue Tracking, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:json_smart_project:json_smart:1.3:*:*:*:*:*:*:* *cpe:2.3:a:json_smart_project:json_smart:2.4:*:*:*:*:*:*:* OR *cpe:2.3:a:json-smart_project:json-smart-v1:*:*:*:*:*:*:*:* versions from (including) 1.3 up to (excluding) 1.3.3 *cpe:2.3:a:json-smart_project:json-smart-v2:*:*:*:*:*:*:*:* versions from (including) 2.4 up to (excluding) 2.4.4
  • Initial Analysis by [email protected]

    Jun. 10, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://github.com/netplex/json-smart-v1/issues/10 No Types Assigned https://github.com/netplex/json-smart-v1/issues/10 Third Party Advisory
    Changed Reference Type https://github.com/netplex/json-smart-v1/pull/11 No Types Assigned https://github.com/netplex/json-smart-v1/pull/11 Patch, Third Party Advisory
    Changed Reference Type https://github.com/netplex/json-smart-v2/issues/67 No Types Assigned https://github.com/netplex/json-smart-v2/issues/67 Exploit, Third Party Advisory
    Changed Reference Type https://github.com/netplex/json-smart-v2/pull/68 No Types Assigned https://github.com/netplex/json-smart-v2/pull/68 Patch, Third Party Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:a:json_smart_project:json_smart:1.3:*:*:*:*:*:*:* *cpe:2.3:a:json_smart_project:json_smart:2.4:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.07 }} -0.01%

score

0.21167

percentile