CVE-2025-8553
BaseFortify
Publication date: 2025-08-05
Last updated on: 2026-04-29
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| pybbs_project | pybbs | to 6.0.0 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-94 | The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. |
| 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?
CVE-2025-8553 is a Reflected Cross-Site Scripting (XSS) vulnerability in the pybbs application up to version 6.0.0. It occurs in the /admin/sensitive_word/list endpoint where the user-controllable 'word' parameter is not properly encoded before being reflected in the web page output. This improper handling allows attackers to inject malicious scripts that execute in the context of administrator users viewing the page, potentially compromising their sessions or executing arbitrary scripts. [1, 2, 3]
How can this vulnerability impact me? :
This vulnerability can impact you by allowing remote attackers to perform reflected XSS attacks against administrator users of the pybbs application. Successful exploitation can lead to execution of arbitrary scripts in the administrator's browser, potentially compromising administrative sessions, stealing sensitive information, or performing unauthorized actions within the application. [1, 2, 3]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by testing the vulnerable endpoint `/admin/sensitive_word/list` for reflected XSS by injecting a payload into the `word` parameter and observing if it is executed. For example, you can use a curl command to send a request with a test payload: curl "http://your-pybbs-instance/admin/sensitive_word/list?word=1\"><img src=1 onerror=alert(9)>" and check if the response contains the injected script or triggers an alert in a browser. Automated web vulnerability scanners that detect reflected XSS can also be used against this endpoint. [2]
What immediate steps should I take to mitigate this vulnerability?
The immediate step to mitigate this vulnerability is to apply the available patch identified by commit `2fe4a51afbce0068c291bc1818bbc8f7f3b01a22` from the pybbs project repository. This patch properly encodes user-controllable parameters to prevent reflected XSS. Until the patch is applied, restrict access to the vulnerable endpoint to trusted administrators only and consider using web application firewalls (WAF) to block suspicious input patterns targeting the `word` parameter. [1, 3]