What’s Vulnerable › Vulnerabilities

CVE-2021-27938

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-16 · updated 2026-06-17
• Weakness: CWE-79

Description

A vulnerability has been identified in the Silverstripe CMS 3 and 4 version of the symbiote/silverstripe-queuedjobs module. A Cross Site Scripting vulnerability allows an attacker to inject an arbitrary payload in the CreateQueuedJobTask dev task via a specially crafted URL.

Affected products

• Symbiote Silverstripe Queued Jobs: from 3.0.0 before 3.0.2; from 3.1.0 before 3.1.4; from 4.0.0 before 4.0.7; from 4.1.0 before 4.1.2; from 4.2.0 before 4.2.4; from 4.3.0 before 4.3.3 — fixed in 3.0.2, 3.1.4, 4.0.7, 4.1.2, 4.2.4, 4.3.3

How to fix

Upgrade to a fixed version: Symbiote Silverstripe Queued Jobs 3.0.2, 3.1.4, 4.0.7, 4.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/symbiote/silverstripe-queuedjobs/releases
• https://www.silverstripe.org/download/security-releases/cve-2021-27938
• https://github.com/symbiote/silverstripe-queuedjobs/releases
• https://www.silverstripe.org/download/security-releases/cve-2021-27938

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