CVE-2021-21445Network attack vector

Cross-site scripting via Content-Type header injection

Published Jan 12, 2021 · Updated Aug 3, 2024

Header manipulation in SAP Commerce Cloud 1808, 1811, 1905, 2005, and 2011 allows remote authenticated users to trigger XSS through HTTP responses. The CEC-HCS-SEC component places unvalidated attacker-controlled data in the HTTP Content-Type response header, which a browser can interpret as active content. Exploitation requires authenticated access and a Web user to receive the crafted response; successful attacks can execute script in that user's context or hijack the page.

CVSS severity5.4
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Header manipulation in SAP Commerce Cloud 1808, 1811, 1905, 2005, and 2011 allows remote authenticated users to trigger XSS through HTTP responses. The CEC-HCS-SEC component places unvalidated attacker-controlled data in the HTTP Content-Type response header, which a browser can interpret as active content. Exploitation requires authenticated access and a Web user to receive the crafted response; successful attacks can execute script in that user's context or hijack the page.

The record

CVE
CVE-2021-21445
Published
Jan 12, 2021
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP Commerce Cloud
Classifications
CWE-444, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1808
  2. Affected versionversion=< 1811
  3. Affected versionversion=< 1905
  4. Affected versionversion=< 2005
  5. Affected versionversion=< 2011

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SAP SE · SAP Commerce Cloudversion=< 1808; version=< 1811; version=< 1905; version=< 2005; version=< 2011

Published CVSS scores

5.4NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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