CVE-2023-6710

A flaw was found in the mod_proxy_cluster in the Apache server. This issue may allow a malicious user to add a script in the 'alias' parameter in the URL to trigger the stored cross-site scripting (XSS) vulnerability. By adding a script on the alias parameter on the URL, it adds a new virtual host and adds the script to the cluster-manager page.

What this means for your business

It affects Modcluster Mod Proxy Cluster. It matters if your company, or a supplier that handles your data, runs it.
An attacker can use it remotely, over a network, with an ordinary user login, but only after tricking someone into an action such as opening a file or a link.

What to do

1Check whether your company or your suppliers run Modcluster Mod Proxy Cluster, and which version. The affected versions are listed further down this page.
2If you do, follow the vendor's guidance. No patch reference has been published yet.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

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Scoring

CVSS: 5.4 (v3.1)
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Assigned by: secalert@redhat.com

Dates

Published: 2023-12-12
Last modified: 2026-09-19
Sources: NVD

Affected products

Modcluster Mod Proxy Clusterall versions
Redhat Enterprise Linux9.0

As listed in the NVD configuration data. Not a statement about your estate.