TI-2020-02679 Aliases CVE-2020-3117 GHSA-mg6c-ww2w-mv2h

Cisco Web Security Appliance and Cisco Content Security Management Appliance HTTP Header Injection Vulnerability

LOW 23CWE-113Published 2020-09-23 · Updated 2024-11-13

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A vulnerability in the API Framework of Cisco AsyncOS for Cisco Web Security Appliance (WSA) and Cisco Content Security Management Appliance (SMA) could allow an unauthenticated, remote attacker to inject crafted HTTP headers in the web server's response. The vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user to access a crafted URL and receive a malicious HTTP response. A successful exploit could allow the attacker to inject arbitrary HTTP headers into valid HTTP responses sent to a user's browser.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00929 60th 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
Cisco	Cisco Web Security Appliance (WSA)	all versions	—	No fix listed	CNA

Cisco Web Security Appliance (WSA) VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:content_security_management_appliance::::::::	before 13.0.0-187	Vulnerable	Cisco
cpe:2.3:a:cisco:web_security_appliance:11.8.0-382:::::::*	11.8.0-382	Vulnerable	Cisco
cpe:2.3:a:cisco:web_security_appliance:12.0.1-268:::::::*	12.0.1-268	Vulnerable	Cisco

cpe:2.3:a:cisco:content_security_management_appliance:*:*:*:*:*:*:*:* Versions before 13.0.0-187 Vulnerable ·Cisco
cpe:2.3:a:cisco:web_security_appliance:11.8.0-382:*:*:*:*:*:*:* Versions 11.8.0-382 Vulnerable ·Cisco
cpe:2.3:a:cisco:web_security_appliance:12.0.1-268:*:*:*:*:*:*:* Versions 12.0.1-268 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-3117
2026-10-03 Alias added: GHSA-mg6c-ww2w-mv2h

References

Advisory 1

20200122 Cisco Web Security Appliance and Cisco Content Security Management Appliance HTTP Header Injection Vulnerability

TI-2016-01993 The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other… CVSS 3.1HIGH 7.5
TI-2014-01669 The End User Safelist/Blocklist (aka SLBL) service in Cisco AsyncOS Software for Email… CVSS 2.0HIGH 8.5
TI-2015-05308 Cisco AsyncOS before 8.5.7-042, 9.x before 9.1.0-032, 9.1.x before 9.1.1-023, and 9.5.x… CVSS 2.0HIGH 7.8
TI-2013-04730 The web framework on Cisco Web Security Appliance (WSA), Email Security Appliance (ESA)… CVSS 2.0HIGH 7.8
TI-2019-01602 Cisco Email Security Appliance and Cisco Content Security Management Appliance Denial of Service Vulnerability CVSS 3.1MEDIUM 5.3
TI-2020-02726 Cisco ESA, Cisco WSA, and Cisco SMA GUI Denial of Service Vulnerability CVSS 3.1MEDIUM 5.3

See all 26 →

Sources

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