MyBB up to 1.8.10 Email MyCode 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 (≈)
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.
4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in MyBB up to 1.8.10. It has been declared as problematic. The affected element is an unknown function of the component Email MyCode. Such manipulation leads to cross site scripting. This vulnerability is listed as CVE-2017-8103. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in MyBB up to 1.8.10 (Content Management System). Affected by this issue is some unknown processing of the component Email MyCode. 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. CVE summarizes:

In MyBB before 1.8.11, the Email MyCode component allows XSS, as demonstrated by an onmouseover event.

The bug was discovered 04/09/2017. The weakness was presented 04/24/2017 (Website). The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2017-8103 since 04/24/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 1.8.11 eliminates this vulnerability.

See VDB-100569 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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: MyBB 1.8.11

Timelineinfo

04/09/2017 🔍
04/24/2017 +15 days 🔍
04/24/2017 +0 days 🔍
04/24/2017 +0 days 🔍
04/25/2017 +1 days 🔍
09/20/2020 +1244 days 🔍

Sourcesinfo

Product: mybb.com

Advisory: seclists.org
Status: Not defined

CVE: CVE-2017-8103 (🔍)
GCVE (CVE): GCVE-0-2017-8103
GCVE (VulDB): GCVE-100-100568
OSVDB: - CVE-2017-8103 - MyBB - Cross-Site Scripting Issue

See also: 🔍

Entryinfo

Created: 04/25/2017 09:04
Updated: 09/20/2020 20:56
Changes: 04/25/2017 09:04 (59), 09/20/2020 20:56 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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