// For flags

CVE-2023-39517

Cross site scripting (XSS) when clicking on an untrusted `<map>` link in Joplin

Severity Score

8.2
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

Joplin is a free, open source note taking and to-do application. A Cross site scripting (XSS) vulnerability in affected versions allows clicking on an untrusted image link to execute arbitrary shell commands. The HTML sanitizer (`packages/renderer/htmlUtils.ts::sanitizeHtml`) preserves `<map>` `<area>` links. However, unlike `<a>` links, the `target` and `href` attributes are not removed. Additionally, because the note preview pane isn't sandboxed to prevent top navigation, links with `target` set to `_top` can replace the toplevel electron page. Because any toplevel electron page, with Joplin's setup, has access to `require` and can require node libraries, a malicious replacement toplevel page can import `child_process` and execute arbitrary shell commands. This issue has been fixed in commit 7c52c3e9a81a52ef1b42a951f9deb9d378d59b0f which is included in release version 2.12.8. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Joplin es una aplicación gratuita y de código abierto para tomar notas y tareas pendientes. Una vulnerabilidad de Cross-Site Scripting (XSS) en las versiones afectadas permite hacer clic en un enlace de imagen que no es de confianza para ejecutar comandos de shell arbitrarios. El sanitizante HTML (`packages/renderer/htmlUtils.ts::sanitizeHtml`) conserva los enlaces `` ``. Sin embargo, a diferencia de los enlaces `<a rel="nofollow">`, los atributos `target` y `href` no se eliminan. Además, debido a que el panel de vista previa de notas no está protegido para evitar la navegación superior, los enlaces con "destino" configurado en "_top" pueden reemplazar la página electrónica de nivel superior. Debido a que cualquier página electrónica de nivel superior, con la configuración de Joplin, tiene acceso a `require` y puede requerir librerías de nodos, una página de nivel superior de reemplazo maliciosa puede importar `child_process` y ejecutar comandos de shell arbitrarios. Este problema se solucionó en el commit 7c52c3e9a81a52ef1b42a951f9deb9d378d59b0f que se incluye en la versión 2.12.8. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad.</a>

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-08-03 CVE Reserved
  • 2024-06-21 CVE Published
  • 2024-08-02 CVE Updated
  • 2024-09-27 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Laurent22
Search vendor "Laurent22"
Joplin
Search vendor "Laurent22" for product "Joplin"
< 2.12.8
Search vendor "Laurent22" for product "Joplin" and version " < 2.12.8"
en
Affected