CVE-2025-53523
Stored XSS in GroupSession Allows Script Execution via Malicious URLs
Publication date: 2025-12-12
Last updated on: 2026-02-17
Assigner: JPCERT/CC
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| groupsession | groupsession | to 5.3.3 (exc) |
| groupsession | groupsession | to 5.3.0 (exc) |
| groupsession | groupsession | to 5.3.2 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a stored cross-site scripting (XSS) issue in GroupSession products before certain versions. A logged-in user can create a malicious page or URL that, when accessed by another user, executes arbitrary scripts in their web browser.
How can this vulnerability impact me? :
The vulnerability can allow attackers to execute arbitrary scripts in the browsers of other users, potentially leading to unauthorized actions, data theft, or session hijacking when users access the malicious content.
What immediate steps should I take to mitigate this vulnerability?
Users are advised to update GroupSession to the latest versions provided by the vendor to mitigate this vulnerability. [2]