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CVE-2023-20120: Cisco Secure Email Gateway, Cisco Secure Email and Web Manager, and Cisco Secure Web Appliance Cross-Site Scripting Vulnerabilities

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-28 · updated 2026-06-17
• Weakness: CWE-79

Description

Multiple vulnerabilities in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and Web Manager; Cisco Secure Email Gateway, formerly Cisco Email Security Appliance (ESA); and Cisco Secure Web Appliance, formerly Cisco Web Security Appliance (WSA), could allow a remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. For more information about these vulnerabilities, see the Details section of this advisory.

Affected products

• Cisco Secure Email And Web Manager: 14.0.0-418, 14.0.1-033, 14.0.1-053, 15.0.0-050, 15.0.0-256
• Cisco Secure Email Gateway: 14.0.0-418, 14.0.1-033, 14.0.1-053, 15.0.0-050, 15.0.0-256
• Cisco Web Security Appliance (WSA): 14.0.0-418, 14.0.1-033, 14.0.1-053, 15.0.0-050, 15.0.0-256

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-sma-wsa-xss-cP9DuEmq
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-sma-wsa-xss-cP9DuEmq

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