// For flags

CVE-2020-13443

 

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

ExpressionEngine before 5.3.2 allows remote attackers to upload and execute arbitrary code in a .php%20 file via Compose Msg, Add attachment, and Save As Draft actions. A user with low privileges (member) is able to upload this. It is possible to bypass the MIME type check and file-extension check while uploading new files. Short aliases are not used for an attachment; instead, direct access is allowed to the uploaded files. It is possible to upload PHP only if one has member access, or registration/forum is enabled and one can create a member with the default group id of 5. To exploit this, one must to be able to send and compose messages (at least).

ExpressionEngine versiones anteriores a 5.3.2, permite a atacantes remotos cargar y ejecutar código arbitrario en un archivo .php%20 por medio de las acciones Componer Msg, Add attachment y Save As Draft. Un usuario con pocos privilegios (miembro) es capaz de cargar esto. Es posible omitir la comprobación del tipo MIME y la comprobación de extensión de archivo al cargar nuevos archivos. Los seudónimos cortos no se usan para un archivo adjunto; en cambio, se permite el acceso directo a los archivos cargados. Es posible cargar PHP solo si uno tiene acceso de miembro, o registration/forum está habilitado y uno puede crear un miembro con el ID de grupo predeterminado de 5. Para explotar esto, uno debe ser capaz de enviar y redactar mensajes (al menos)

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
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
  • 2020-05-25 CVE Reserved
  • 2020-06-24 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2025-01-05 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-434: Unrestricted Upload of File with Dangerous Type
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Expressionengine
Search vendor "Expressionengine"
 Expressionengine
Search vendor "Expressionengine" for product "Expressionengine"
 < 5.3.2
Search vendor "Expressionengine" for product "Expressionengine" and version " < 5.3.2"
-
Affected