CVE-2020-15139
MyBB DOM-Based XSS Vulnerability
Description
In MyBB before version 1.8.24, the custom MyCode (BBCode) for the visual editor doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. The weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as a post or Private Message) and operates on a maliciously crafted MyCode message. This may occur on pages where message content is pre-filled using a GET/POST parameter, or on reply pages where a previously saved malicious message is quoted. After upgrading MyBB to 1.8.24, make sure to update the version attribute in the `codebuttons` template for non-default themes to serve the latest version of the patched `jscripts/bbcodes_sceditor.js` file.
INFO
Published Date :
Aug. 10, 2020, 10:15 p.m.
Last Modified :
Aug. 13, 2020, 3:58 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-15139.
| URL | Resource |
|---|---|
| https://github.com/mybb/mybb/commit/37ad29dcd25489a37bdd89ebac761f22492558b0 | Patch Third Party Advisory |
| https://github.com/mybb/mybb/security/advisories/GHSA-37h7-vfv6-f8rj | Patch Third Party Advisory |
| https://mybb.com/versions/1.8.24/ | Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-15139 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-15139 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Aug. 13, 2020
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Changed Reference Type https://github.com/mybb/mybb/commit/37ad29dcd25489a37bdd89ebac761f22492558b0 No Types Assigned https://github.com/mybb/mybb/commit/37ad29dcd25489a37bdd89ebac761f22492558b0 Patch, Third Party Advisory Changed Reference Type https://github.com/mybb/mybb/security/advisories/GHSA-37h7-vfv6-f8rj No Types Assigned https://github.com/mybb/mybb/security/advisories/GHSA-37h7-vfv6-f8rj Patch, Third Party Advisory Changed Reference Type https://mybb.com/versions/1.8.24/ No Types Assigned https://mybb.com/versions/1.8.24/ Patch, Vendor Advisory Added CWE NIST CWE-79 Added CPE Configuration OR *cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:* versions up to (excluding) 1.8.24
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-15139 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-15139
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.01%
score
0.35932
percentile