CVE-2021-27938 : Security Advisory and Response

Silverstripe CMS versions 3 and 4, specifically the symbiote/silverstripe-queuedjobs module, are affected by a Cross Site Scripting vulnerability. This weakness enables an attacker to inject malicious code into the CreateQueuedJobTask dev task using a manipulated URL.

Understanding CVE-2021-27938

This CVE identifies a security flaw in the Silverstripe CMS version 3 and 4 related to the symbiote/silverstripe-queuedjobs module.

What is CVE-2021-27938?

A Cross Site Scripting vulnerability in Silverstripe allows attackers to insert harmful payloads via specially crafted URLs, impacting the CreateQueuedJobTask dev task.

The Impact of CVE-2021-27938

This vulnerability can be exploited by malicious actors to execute arbitrary code within the affected CMS versions, potentially leading to unauthorized data access or manipulation.

Technical Details of CVE-2021-27938

The technical specifics of the CVE, including the vulnerability description, affected systems, and exploitation method.

Vulnerability Description

The vulnerability enables attackers to perform Cross Site Scripting attacks by injecting malicious payloads into the CreateQueuedJobTask dev task through manipulated URLs.

Affected Systems and Versions

Silverstripe CMS versions 3 and 4 are confirmed to be impacted by this vulnerability, specifically in the symbiote/silverstripe-queuedjobs module.

Exploitation Mechanism

By crafting URLs with malicious payloads, threat actors can exploit this vulnerability to execute unauthorized code within the Silverstripe CMS.

Mitigation and Prevention

Effective strategies and measures to mitigate the risks associated with CVE-2021-27938.

Immediate Steps to Take

Users are advised to update the Silverstripe CMS to a patched version, implement security best practices, and closely monitor for suspicious activities.

Long-Term Security Practices

Regular security audits, training programs for developers on secure coding practices, and timely software updates are essential for long-term security.

Patching and Updates

Stay informed about security releases from Silverstripe and promptly apply patches to address known vulnerabilities.