# CVE-2025-2748: Kentico Xperience - RCE

> Live exploitation tracking for CVE-2025-2748 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-2748

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 6.5
- **Public exploit available:** Yes
- **Affected products:** Kentico Xperience
- **Weaknesses:** CWE-434 (Unrestricted Upload of File with Dangerous Type); CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

## Description

The Kentico Xperience application does not fully validate or filter files uploaded via the multiple-file upload functionality, which allows for stored XSS.This issue affects Kentico Xperience through 13.0.178.

## CrowdSec analysis

[CVE-2025-2748](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-2748) is a vulnerability in Kentico Xperience that permits stored cross-site scripting (XSS) due to insufficient validation of files uploaded through the application's multiple-file upload functionality.

CrowdSec has been tracking this vulnerability and its exploits since 1st of April 2025.

CrowdSec network observations suggest that most exploitation of CVE-2025-2748 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental.
CrowdSec network telemetry also shows that exploitation of CVE-2025-2748 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Observed exploitation attempts typically involve requests to URLs containing `/cmsmodules/content/cmspages/multifileuploader.ashx`.

## Timeline

- 2025-02-18: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-2748 for the first time.
- 2025-03-24: CVE Published. CVE-2025-2748 is published to NVD.
- 2025-04-01: Rule Released. CrowdSec releases a rule to detect CVE-2025-2748 exploitation attempts against the CrowdSec Network.

## References

- https://devnet.kentico.com/download/hotfixes
- https://labs.watchtowr.com/xss-to-rce-by-abusing-custom-file-handlers-kentico-xperience-cms-cve-2025-2748/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-2748.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-2748) follows observed exploitation activity for CVE-2025-2748. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.