Markdown Preview Plus Extension up to 0.5.6 on Chrome 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 (≈)
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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.
4.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Markdown Preview Plus Extension up to 0.5.6 on Chrome. The impacted element is an unknown function. The manipulation leads to cross site scripting. This vulnerability is documented as CVE-2017-11593. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Markdown Preview Plus Extension up to 0.5.6 on Chrome and classified as problematic. This issue affects an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject arbitrary web script or HTML into some web applications via the upload and display of crafted text, markdown, or rst files that are designed to be viewed in the browser as plain text, but that will be converted to HTML without proper sanitization.

The bug was discovered 03/05/2017. The weakness was released 07/24/2017 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2017-11593 since 07/23/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 T1059.007 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 140 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 0.5.7 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
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

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Markdown Preview Plus Extension 0.5.7
Patch: github.com

Timelineinfo

03/05/2017 🔍
07/23/2017 +140 days 🔍
07/23/2017 +0 days 🔍
07/24/2017 +1 days 🔍
07/24/2017 +0 days 🔍
12/13/2022 +1968 days 🔍

Sourcesinfo

Advisory: 1181f044a5457d5e1ac35804ecd84e05977f1920
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-11593 (🔍)
GCVE (CVE): GCVE-0-2017-11593
GCVE (VulDB): GCVE-100-104441

Entryinfo

Created: 07/24/2017 12:21
Updated: 12/13/2022 18:00
Changes: 07/24/2017 12:21 (57), 10/31/2019 20:14 (2), 12/13/2022 18:00 (5)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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