CVE-2021-25978

Apostrophe - XSS

Description

Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed.

Remediation

Solution:

  • Upgrade to version 3.4.0

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.21%
Third-Party Advisory github.com
Affected: Apostrophe Apostrophe
Published at:
Updated at:

References

Link Tags
https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-25978?
CVE-2021-25978 has been scored as a medium severity vulnerability.
How to fix CVE-2021-25978?
To fix CVE-2021-25978: Upgrade to version 3.4.0
Is CVE-2021-25978 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-25978 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-25978?
CVE-2021-25978 affects Apostrophe Apostrophe .
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