CVE-2021-27938

Name: CVE-2021-27938
Creator: NVD / NIST
Published: 2021-03-16T16:15:14.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.75%

Last modified Jun 17, 2026

CVE-2021-27938 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.75% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.75%

50.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Symbiote	Silverstripe Queued Jobs	>= 3.0.0, < 3.0.2
Symbiote	Silverstripe Queued Jobs	>= 3.1.0, < 3.1.4
Symbiote	Silverstripe Queued Jobs	>= 4.0.0, < 4.0.7
Symbiote	Silverstripe Queued Jobs	>= 4.1.0, < 4.1.2
Symbiote	Silverstripe Queued Jobs	>= 4.2.0, < 4.2.4
Symbiote	Silverstripe Queued Jobs	>= 4.3.0, < 4.3.3
Symbiote	Silverstripe Queued Jobs	>= 4.4.0, < 4.4.3
Symbiote	Silverstripe Queued Jobs	>= 4.5.0, < 4.5.1
Symbiote	Silverstripe Queued Jobs	>= 4.6.0, < 4.6.4

References

https://github.com/symbiote/silverstripe-queuedjobs/releasesRelease Notes, Third Party Advisory
https://www.silverstripe.org/download/security-releases/cve-2021-27938Third Party Advisory
https://github.com/symbiote/silverstripe-queuedjobs/releasesRelease Notes, Third Party Advisory
https://www.silverstripe.org/download/security-releases/cve-2021-27938Third Party Advisory

Timeline

Published: Mar 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27938?

How severe is CVE-2021-27938?

CVE-2021-27938 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27938?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27938?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST