CVE-2025-56526
Kotaemon XSS Vulnerability
Description
Cross site scripting (XSS) vulnerability in Kotaemon 0.11.0 allowing attackers to execute arbitrary code via a crafted PDF.
INFO
Published Date :
Nov. 18, 2025, 5:16 p.m.
Last Modified :
Dec. 2, 2025, 7:35 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Kotaemon to the latest version.
- Apply vendor patches for XSS vulnerability.
- Sanitize user-supplied PDF input.
Public PoC/Exploit Available at Github
CVE-2025-56526 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2025-56526.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-56526 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-2025-56526
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).
Public disclosure for CVE-2025-56526 and CVE-2025-56527 — Stored XSS via unsanitized PDF content rendering and plaintext credential exposure in Kotaemon 0.11.0. Includes full technical analysis, PoC, impact assessment, and responsible disclosure timeline.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-56526 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-56526 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.
-
Initial Analysis by [email protected]
Dec. 02, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:cinnamon:kotaemon:*:*:*:*:*:*:*:* versions up to (including) 0.11.0 Added Reference Type MITRE: https://github.com/Cinnamon/kotaemon Types: Product Added Reference Type MITRE: https://github.com/Cinnamon/kotaemon/commit/37cdc28 Types: Patch Added Reference Type MITRE: https://github.com/HanTul/Kotaemon-CVE-2025-56526-56527-disclosure Types: Exploit, Third Party Advisory Added Reference Type MITRE: https://harvest-sink-590.notion.site/Stored-XSS-via-Unsanitized-PDF-Content-Rendering-and-Plaintext-Credential-Exposure-in-LocalStorage-236770c3fe1e80f6a1aef381fb1c8f73 Types: Exploit, Third Party Advisory Added Reference Type MITRE: https://skinny-exoplanet-584.notion.site/Stored-XSS-via-Unsanitized-PDF-Content-Rendering-and-Plaintext-Credential-Exposure-in-LocalStorage-22cd1563bd3380458588eb49f361a363 Types: Exploit, Third Party Advisory -
CVE Modified by [email protected]
Nov. 19, 2025
Action Type Old Value New Value Added Reference https://harvest-sink-590.notion.site/Stored-XSS-via-Unsanitized-PDF-Content-Rendering-and-Plaintext-Credential-Exposure-in-LocalStorage-236770c3fe1e80f6a1aef381fb1c8f73 -
New CVE Received by [email protected]
Nov. 18, 2025
Action Type Old Value New Value Added Description Cross site scripting (XSS) vulnerability in Kotaemon 0.11.0 allowing attackers to execute arbitrary code via a crafted PDF. Added Reference https://github.com/Cinnamon/kotaemon Added Reference https://github.com/Cinnamon/kotaemon/commit/37cdc28 Added Reference https://github.com/HanTul/Kotaemon-CVE-2025-56526-56527-disclosure Added Reference https://skinny-exoplanet-584.notion.site/Stored-XSS-via-Unsanitized-PDF-Content-Rendering-and-Plaintext-Credential-Exposure-in-LocalStorage-22cd1563bd3380458588eb49f361a363 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 18, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-79