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Medium severity · published Nov 30, 2023
CVE-2021-36806
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
6.1
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EA
Email Appliance · Sophos
before 4.5.3.4 · source: NVD
Affected product
EA
Email Appliance
Sophos
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-36806
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-36806
Third Party Advisory
https://community.sophos.com/email-appliance/b/blog/posts/sophos-email-appliance-version-4-5-3-4-released