// For flags

CVE-2019-12831

 

Severity Score

7.2
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In MyBB before 1.8.21, an attacker can abuse a default behavior of MySQL on many systems (that leads to truncation of strings that are too long for a database column) to create a PHP shell in the cache directory of a targeted forum via a crafted XML import, as demonstrated by truncation of aaaaaaaaaaaaaaaaaaaaaaaaaa.php.css to aaaaaaaaaaaaaaaaaaaaaaaaaa.php with a 30-character limit, aka theme import stylesheet name RCE.

En MyBB anterior a versión 1.8.21, un atacante puede abusar de un comportamiento por defecto de MySQL en muchos sistemas (lo que conlleva a un truncamiento de cadenas que muy largas para una columna de la base de datos) para crear un shell PHP en el directorio de caché de un foro apuntado por medio de un importación XML creada, como es demostrado mediante el truncamiento de aaaaaaaaaaaaaaaaaaaaaaaa.php.css a aaaaaaaaaaaaaaaaaaaaaaaaaa.php con un límite de 30 caracteres, también se conoce como Ejecución de Código Remota (RCE) del nombre de la hoja de estilo (stylesheet name) theme import

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-06-15 CVE Reserved
  • 2019-06-15 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-20: Improper Input Validation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mybb
Search vendor "Mybb"
Mybb
Search vendor "Mybb" for product "Mybb"
< 1.8.21
Search vendor "Mybb" for product "Mybb" and version " < 1.8.21"
-
Affected