CVE-2023-37908

Xwiki Xwiki-rendering cross-site scripting (XSS)

9.0 CRITICALEPSS 1.06%

Published25 Oct 2023

Description

XWiki Rendering is a generic Rendering system that converts textual input in a given syntax into another syntax. The cleaning of attributes during XHTML rendering, introduced in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid attribute names. This can be exploited, e.g., via the link syntax in any content that supports XWiki syntax like comments in XWiki. When a user moves the mouse over a malicious link, the malicious JavaScript code is executed in the context of the user session. When this user is a privileged user who has programming rights, this allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance. While this attribute was correctly recognized as not allowed, the attribute was still printed with a prefix `data-xwiki-translated-attribute-` without further cleaning or validation. This problem has been patched in XWiki 14.10.4 and 15.0 RC1 by removing characters not allowed in data attributes and then validating the cleaned attribute again. There are no known workarounds apart from upgrading to a version including the fix.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionRequired

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Xwiki Xwiki-rendering≥ 14.6 < 14.10.4

Remediation

Fixed in

Xwiki Xwiki-rendering≥ 14.10.4

Frequently asked

Is CVE-2023-37908 being actively exploited?

CVE-2023-37908 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.06%.

How severe is CVE-2023-37908?

CVE-2023-37908 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 1.06% probability of exploitation.

Which products are affected by CVE-2023-37908?

Affected products include Xwiki Xwiki-rendering.

How do I fix CVE-2023-37908?

Upgrade affected software to a fixed version, for example Xwiki Xwiki-rendering 14.10.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-37908 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.