cnvs.io Canvas 3.3.0 Posts title/content cross site scripting

CVSS Meta Temp Score
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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.
4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in cnvs.io Canvas 3.3.0. It has been classified as problematic. This impacts an unknown function of the component Posts Handler. The manipulation of the argument title/content leads to cross site scripting. This vulnerability is uniquely identified as CVE-2017-8298. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in cnvs.io Canvas 3.3.0. It has been rated as problematic. This issue affects an unknown code block of the component Posts Handler. The manipulation of the argument title/content 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:

cnvs.io Canvas 3.3.0 has XSS in the title and content fields of a "Posts > Add New" action, and during creation of new tags and users.

The bug was discovered 04/23/2017. The weakness was disclosed 04/27/2017 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2017-8298 since 04/27/2017. The attack may be initiated remotely. The requirement for exploitation is a simple authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is 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 4 days. During that time the estimated underground price was around $0-$5k.

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

Vendor

Name

Version

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: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/23/2017 🔍
04/27/2017 +4 days 🔍
04/27/2017 +0 days 🔍
04/27/2017 +0 days 🔍
04/28/2017 +1 days 🔍
12/02/2022 +2044 days 🔍

Sourcesinfo

Advisory: 331
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-8298 (🔍)
GCVE (CVE): GCVE-0-2017-8298
GCVE (VulDB): GCVE-100-100637

Entryinfo

Created: 04/28/2017 20:17
Updated: 12/02/2022 12:23
Changes: 04/28/2017 20:17 (57), 12/30/2019 08:11 (2), 12/02/2022 12:23 (4)
Complete: 🔍
Cache ID: 216::103

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