CHIYU BF-430 232/485 TCP-IP Converter up to 1.15.x /if.cgi TF_submask Stored cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability was found in CHIYU BF-430 232 and 485 TCP-IP Converter up to 1.15.x and classified as problematic. Affected by this vulnerability is an unknown functionality of the file /if.cgi. The manipulation of the argument TF_submask results in cross site scripting (Stored). This vulnerability is cataloged as CVE-2020-8839. The attack may be launched remotely. Furthermore, there is an exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in CHIYU BF-430 232 and 485 TCP-IP Converter up to 1.15.x. Affected is an unknown code of the file /if.cgi. The manipulation of the argument TF_submask with an unknown input leads to a cross site scripting vulnerability (Stored). 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. CVE summarizes:

Stored XSS was discovered on CHIYU BF-430 232/485 TCP/IP Converter devices before 1.16.00, as demonstrated by the /if.cgi TF_submask field.

The weakness was shared 02/12/2020. This vulnerability is traded as CVE-2020-8839 since 02/10/2020. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 1.16.00 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (48040). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: BF-430 232/485 TCP-IP Converter 1.16.00

Timelineinfo

02/10/2020 🔍
02/12/2020 +2 days 🔍
02/13/2020 +1 days 🔍
05/10/2025 +1913 days 🔍

Sourcesinfo

Advisory: 156289
Status: Confirmed

CVE: CVE-2020-8839 (🔍)
GCVE (CVE): GCVE-0-2020-8839
GCVE (VulDB): GCVE-100-150084
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/13/2020 08:26
Updated: 05/10/2025 13:18
Changes: 02/13/2020 08:26 (39), 02/13/2020 08:31 (17), 03/30/2024 16:17 (19), 06/18/2024 21:07 (11), 05/10/2025 13:18 (6)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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