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CVE-2023-42458 : Security Advisory and Response

Learn about CVE-2023-42458 impacting Zope web application server versions before 4.8.10 and 5.8.5 due to a stored cross site scripting (XSS) vulnerability with SVG images. Find mitigation steps here.

Zope vulnerable to Stored Cross Site Scripting with SVG images

Understanding CVE-2023-42458

Zope, an open-source web application server, is susceptible to stored cross-site scripting (XSS) with SVG images in versions earlier than 4.8.10 and 5.8.5.

What is CVE-2023-42458?

Zope versions < 4.8.10 and >= 5.0.0, < 5.8.5 are impacted by a stored cross-site scripting vulnerability that allows attackers to upload a specially crafted image to exploit the server.

The Impact of CVE-2023-42458

The vulnerability could be leveraged by malicious actors to execute arbitrary code on a targeted user's browser, potentially leading to sensitive data theft or unauthorized account access.

Technical Details of CVE-2023-42458

Zope prior to versions 4.8.10 and 5.8.5 is vulnerable to stored XSS with SVG images, where an attacker can upload a malicious SVG image and execute script code when users access the crafted link.

Vulnerability Description

An attacker needs to upload a specially crafted image to the server and then entice a user to click on a manipulated link to trigger the malicious script execution.

Affected Systems and Versions

        Vendor: zopefoundation
        Product: Zope
        Affected Versions:
              < 4.8.10

              = 5.0.0, < 5.8.5

Exploitation Mechanism

The attacker can exploit this vulnerability by uploading a crafted SVG image, tricking a user into following a manipulated link, and executing malicious code on the user's browser.

Mitigation and Prevention

To address CVE-2023-42458, users and administrators are advised to take immediate steps to secure their systems and implement long-term security practices.

Immediate Steps to Take

        Apply the available patches in Zope versions 4.8.10 and 5.8.5 to mitigate the vulnerability.
        Restrict the "Add Documents, Images, and Files" permission to trusted roles only.

Long-Term Security Practices

        Regularly update Zope to the latest version to ensure protection against known vulnerabilities.
        Educate users on safe browsing practices and the importance of not clicking on suspicious links.

Patching and Updates

Install the latest patches provided by Zope in versions 4.8.10 and 5.8.5 to address the stored cross-site scripting vulnerability with SVG images.

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