GroupSession Free Edition/byCloud/ZION up to 5.1.1 redirect

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 (≈)
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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.
6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in GroupSession Free Edition, byCloud and ZION up to 5.1.1. It has been classified as critical. This issue affects some unknown processing. This manipulation causes redirect. This vulnerability is handled as CVE-2021-20875. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in GroupSession Free Edition, byCloud and ZION up to 5.1.1 (Cloud Software). It has been declared as critical. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a redirect vulnerability. The CWE definition for the vulnerability is CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 12/24/2021. The advisory is shared at groupsession.jp. This vulnerability is known as CVE-2021-20875 since 12/17/2020. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1204.001 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Redirect
CWE: CWE-601
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2020 🔍
12/24/2021 +372 days 🔍
12/24/2021 +0 days 🔍
12/27/2021 +3 days 🔍

Sourcesinfo

Advisory: groupsession.jp
Status: Confirmed

CVE: CVE-2021-20875 (🔍)
GCVE (CVE): GCVE-0-2021-20875
GCVE (VulDB): GCVE-100-189061

Entryinfo

Created: 12/24/2021 13:55
Updated: 12/27/2021 09:15
Changes: 12/24/2021 13:55 (36), 12/27/2021 09:15 (1)
Complete: 🔍
Cache ID: 216::103

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