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Servers and applications

CVE-2021-27910

Stored XSS vulnerability on Bounce Management Callback

Severity
Medium 6.1
Published
30 Aug 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.3.4
Also known as
GHSA-86pv-95mj-7w5f
Sources
NVD, Project advisories (GitHub)

Description

Insufficient sanitization / filtering allows for arbitrary JavaScript Injection in Mautic using the bounce management callback function. The values submitted in the "error" and "error_related_to" parameters of the POST request of the bounce management callback will be permanently stored and executed once the details page of an affected lead is opened by a Mautic user. An attacker with access to…

Affected software

SoftwareAffected versions
MauticServers and applications · cpe:a:acquia:mautic
  • Every version before 3.3.4
  • Version 4.0.0-alpha1
  • Version 4.0.0-beta
  • Version 4.0.0-rc
MauticServers and applications · github:mautic/mautic
  • Every version before 3.3.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-27910
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-27910
  • GitHub Advisory Database https://github.com/advisories/GHSA-86pv-95mj-7w5f
  • github.com https://github.com/mautic/mautic/security/advisories/GHSA-86pv-95mj-7w5f