YzmCMS 5.5 grab_image server-side request forgery

EntryeditHistoryDiffjsonxmlCTI

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.
5.5	$0-$5k	0.00

A vulnerability classified as critical has been found in YzmCMS 5.5. Affected is the function grab_image. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-918. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

YzmCMS v5.5 contains a server-side request forgery (SSRF) in the grab_image() function.

The weakness was released 09/02/2021. The advisory is available at github.com. This vulnerability is traded as CVE-2020-20341 since 08/13/2020. The exploitability is told to be easy. The attack needs to be done within the local network. A authentication is necessary for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/05/2021).

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

Productinfoedit

Name

YzmCMS

CPE 2.3infoedit

🔒

CPE 2.2infoedit

🔒

CVSSv3infoedit

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2infoedit

AV	AC	Au	C	I	A
🔍	🔍	🔍	🔍	🔍	🔍
🔍	🔍	🔍	🔍	🔍	🔍
🔍	🔍	🔍	🔍	🔍	🔍

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-918
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfoedit

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

Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

08/13/2020 CVE reserved
09/02/2021 +385 days Advisory disclosed
09/02/2021 +0 days VulDB entry created
09/05/2021 +3 days VulDB last update

Sourcesinfoedit

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-20341 (🔒)

Entryinfoedit

Created: 09/02/2021 10:19 AM
Updated: 09/05/2021 04:04 AM
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍