CVE-2019-12830

CVSS V2 Low 3.5 CVSS V3 High 8.7

Description

In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCode issue.

Overview

CVE ID
CVE-2019-12830

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2019-06-15T18:29:00

Last Modified Date
2019-06-20T12:46:47

Weakness Enumerations

CWE	URL
CWE-79	http://cwe.mitre.org/data/definitions/79.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:mybb:mybb::::::::	1	OR		1.8.21

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:M/Au:S/C:N/I:P/A:N

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
SINGLE

Confidentiality Impact
NONE

Integrity Impact
PARTIAL

Availability Impact
NONE

Base Score
3.5

Severity
LOW

Exploitability Score
6.8

Impact Score
2.9

CVSS Version 3

Version
3.0

Vector String
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
REQUIRED

Scope
CHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
8.7

Base Severity
HIGH

Exploitability Score
2.3

Impact Score
5.8

References

Reference URL	Reference Tags
https://blog.ripstech.com/2019/mybb-stored-xss-to-rce/	Exploit Vendor Advisory
https://blog.mybb.com/2019/06/10/mybb-1-8-21-released-security-maintenance-release/	Release Notes Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2019-12830
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12830

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:49:54				Added to TrackCVE
2022-12-03 22:08:31	2019-06-15T18:29Z	2019-06-15T18:29:00	CVE Published Date	updated
2022-12-03 22:08:31		2019-06-20T12:46:47	CVE Modified Date	updated
2022-12-03 22:08:31		Analyzed	Vulnerability Status	updated