CVE-2025-64711
PrivateBin vulnerable to malicious filename use for self-XSS / HTML injection locally for users
Description
PrivateBin is an online pastebin where the server has zero knowledge of pasted data. Starting in version 1.7.7 and prior to version 2.0.3, dragging a file whose filename contains HTML is reflected verbatim into the page via the drag-and-drop helper, so any user who drops a crafted file on PrivateBin will execute arbitrary JavaScript within their own session (self-XSS). This allows an attacker who can entice a victim to drag or otherwise attach such a file to exfiltrate plaintext, encryption keys, or stored pastes before they are encrypted or sent. Certain conditions must exist for the vulnerability to be exploitable. Only macOS or Linux users are affected, due to the way the `>` character is treated in a file name on Windows. The PrivateBin instance needs to have file upload enabled. An attacker needs to have access to the local file system or somehow convince the user to create (or download) a malicious file (name). An attacker needs to convince the user to attach that malicious file to PrivateBin. Any Mac / Linux user who can be tricked into dragging a maliciously named file into the editor is impacted; code runs in the origin of the PrivateBin instance they are using. Attackers can steal plaintext, passphrases, or manipulate the UI before data is encrypted, defeating the zero-knowledge guarantees for that victim session, assuming counter-measures like Content-Security-Policy (CSP) have been disabled. If CSP is not disabled, HTML injection attacks may be possible - like redirecting to a foreign website, phishing etc. As the whole exploit needs to be included in the file name of the attached file and only affects the local session of the user (aka it is neither persistent nor remotely executable) and that user needs to interact and actively attach that file to the paste, the impact is considered to be practically low. Version 2.0.3 patches the issue.
INFO
Published Date :
Nov. 13, 2025, 3:16 a.m.
Last Modified :
Oct. 19, 2026, 1:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update PrivateBin to version 2.0.3 or later.
- Ensure file uploads are secured.
- Consider implementing Content-Security-Policy (CSP).
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-2025-64711.
| URL | Resource |
|---|---|
| https://github.com/PrivateBin/PrivateBin/commit/f9550e513381208b36595ee2404e968144bba78b | Patch |
| https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-r9x7-7ggj-fx9f | Exploit Mitigation Vendor Advisory |
| https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-r9x7-7ggj-fx9f | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-64711 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-2025-64711
weaknesses.
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-2025-64711 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-64711 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 Translated by [email protected]
Oct. 19, 2026
Action Type Old Value New Value Added Translation Title: PrivateBin, Description: PrivateBin es un pastebin en línea donde el servidor tiene conocimiento cero de los datos pegados. A partir de la versión 1.7.7 y antes de la versión 2.0.3, arrastrar un archivo cuyo nombre de archivo contiene HTML se refleja textualmente en la página a través del asistente de arrastrar y soltar, por lo que cualquier usuario que suelte un archivo manipulado en PrivateBin ejecutará JavaScript arbitrario dentro de su propia sesión (self-XSS). Esto permite a un atacante que puede atraer a una víctima para que arrastre o adjunte de otra manera dicho archivo exfiltrar texto plano, claves de cifrado o pegados almacenados antes de que sean cifrados o enviados. Deben existir ciertas condiciones para que la vulnerabilidad sea explotable. Solo los usuarios de macOS o Linux se ven afectados, debido a la forma en que se trata el carácter '>' en un nombre de archivo en Windows. La instancia de PrivateBin necesita tener la carga de archivos habilitada. Un atacante necesita tener acceso al sistema de archivos local o de alguna manera convencer al usuario de crear (o descargar) un archivo (nombre) malicioso. Un atacante necesita convencer al usuario de adjuntar ese archivo malicioso a PrivateBin. Cualquier usuario de Mac / Linux que pueda ser engañado para arrastrar un archivo con nombre malicioso al editor es impactado; el código se ejecuta en el origen de la instancia de PrivateBin que están utilizando. Los atacantes pueden robar texto plano, frases de contraseña o manipular la interfaz de usuario antes de que los datos sean cifrados, anulando las garantías de conocimiento cero para esa sesión de víctima, asumiendo que las contramedidas como Content-Security-Policy (CSP) han sido deshabilitadas. Si CSP no está deshabilitado, los ataques de inyección HTML pueden ser posibles, como redirigir a un sitio web externo, phishing, etc. Dado que todo el exploit debe incluirse en el nombre de archivo del archivo adjunto y solo afecta la sesión local del usuario (es decir, no es persistente ni ejecutable remotamente) y ese usuario necesita interactuar y adjuntar activamente ese archivo al pegado, el impacto se considera prácticamente bajo. La versión 2.0.3 corrige el problema. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'PrivateBin', 'product': 'PrivateBin', 'versions': [{'status': 'affected', 'version': '>= 1.7.7, < 2.0.3'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-64711', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2025-11-13T14:28:32.150477Z'} -
Initial Analysis by [email protected]
Nov. 25, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:privatebin:privatebin:*:*:*:*:*:*:*:* versions from (including) 1.7.7 up to (excluding) 2.0.3 Added Reference Type GitHub, Inc.: https://github.com/PrivateBin/PrivateBin/commit/f9550e513381208b36595ee2404e968144bba78b Types: Patch Added Reference Type CISA-ADP: https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-r9x7-7ggj-fx9f Types: Exploit, Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-r9x7-7ggj-fx9f Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 13, 2025
Action Type Old Value New Value Added Reference https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-r9x7-7ggj-fx9f -
New CVE Received by [email protected]
Nov. 13, 2025
Action Type Old Value New Value Added Description PrivateBin is an online pastebin where the server has zero knowledge of pasted data. Starting in version 1.7.7 and prior to version 2.0.3, dragging a file whose filename contains HTML is reflected verbatim into the page via the drag-and-drop helper, so any user who drops a crafted file on PrivateBin will execute arbitrary JavaScript within their own session (self-XSS). This allows an attacker who can entice a victim to drag or otherwise attach such a file to exfiltrate plaintext, encryption keys, or stored pastes before they are encrypted or sent. Certain conditions must exist for the vulnerability to be exploitable. Only macOS or Linux users are affected, due to the way the `>` character is treated in a file name on Windows. The PrivateBin instance needs to have file upload enabled. An attacker needs to have access to the local file system or somehow convince the user to create (or download) a malicious file (name). An attacker needs to convince the user to attach that malicious file to PrivateBin. Any Mac / Linux user who can be tricked into dragging a maliciously named file into the editor is impacted; code runs in the origin of the PrivateBin instance they are using. Attackers can steal plaintext, passphrases, or manipulate the UI before data is encrypted, defeating the zero-knowledge guarantees for that victim session, assuming counter-measures like Content-Security-Policy (CSP) have been disabled. If CSP is not disabled, HTML injection attacks may be possible - like redirecting to a foreign website, phishing etc. As the whole exploit needs to be included in the file name of the attached file and only affects the local session of the user (aka it is neither persistent nor remotely executable) and that user needs to interact and actively attach that file to the paste, the impact is considered to be practically low. Version 2.0.3 patches the issue. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://github.com/PrivateBin/PrivateBin/commit/f9550e513381208b36595ee2404e968144bba78b Added Reference https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-r9x7-7ggj-fx9f