CVE-2023-20120 — Multiple vulnerabilities in the web-based management interface of Cisco AsyncOS

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),

01What is this vulnerability?

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…

02Affected products

Vendor	Product	Versions
Cisco	Cisco Web Security Appliance (WSA)	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-28T00:00:00.000Z
• Last modified: 2024-10-25T15:56:47.035Z

09References

• sec.cloudapps.cisco.com — https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ci…