TI-2021-14926 Aliases CVE-2021-36806 GHSA-f39q-q9f3-6vmw

Cross-site scripting in Sophos Email Appliance

LOW 28CWE-79Published 2023-11-30 · Updated 2024-12-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

A reflected XSS vulnerability allows an open redirect when the victim clicks a malicious link to an error page on Sophos Email Appliance older than version 4.5.3.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00432 37th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Sophos	Sophos Email Appliance	4.5.3.3	—	No fix listed	CNA

Sophos Email Appliance VendorSophos Affected 4.5.3.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sophos:email_appliance::::::::	before 4.5.3.4	Vulnerable	Sophos

cpe:2.3:a:sophos:email_appliance:*:*:*:*:*:*:*:* Versions before 4.5.3.4 Vulnerable ·Sophos

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-36806
2026-10-03 Alias added: GHSA-f39q-q9f3-6vmw

References

Advisory 1

https://community.sophos.com/email-appliance/b/blog/posts/sophos-email-appliance-version-4-5-3-4-released

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences