VDB-244494 · CVE-2021-4431 · GCVE-100-244494

msyk FMDataAPI up to 22 FMDataAPI_Sample.php cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in msyk FMDataAPI up to 22. This affects an unknown function of the file FMDataAPI_Sample.php. The manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2021-4431. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in msyk FMDataAPI up to 22. Affected is an unknown code block of the file FMDataAPI_Sample.php. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity.

The weakness was shared 08/27/2021. The advisory is available at github.com. This vulnerability is traded as CVE-2021-4431. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

By approaching the search of inurl:FMDataAPI_Sample.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 23 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3bd1709a8f7b1720529bf5dfc9855ad609f436cf is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Fix XSS in FMDataAPI_Sample.php

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Productinfo

Vendor

msyk

Name

FMDataAPI

Version

License

open-source

Website

Product: https://github.com/msyk/FMDataAPI/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CNA Base Score: 3.5
CNA Vector (VulDB): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: FMDataAPI 23
Patch: 3bd1709a8f7b1720529bf5dfc9855ad609f436cf

Timelineinfo

08/27/2021 🔍
08/27/2021 +0 days 🔍
11/05/2023 +800 days 🔍
11/05/2023 +0 days 🔍
04/21/2025 +533 days 🔍

Sourcesinfo

Product: github.com

Advisory: 3bd1709a8f7b1720529bf5dfc9855ad609f436cf
Status: Confirmed

CVE: CVE-2021-4431 (🔍)
GCVE (CVE): GCVE-0-2021-4431
GCVE (VulDB): GCVE-100-244494

Entryinfo

Created: 11/05/2023 17:51
Updated: 04/21/2025 06:13
Changes: 11/05/2023 17:51 (43), 11/05/2023 17:52 (1), 12/02/2023 08:59 (3), 12/02/2023 09:02 (28), 06/05/2024 17:09 (22), 04/21/2025 06:13 (4)
Complete: 🔍
Cache ID: 216::103