CVE-2021-42063Public exploitNetwork attack vector

Reflected XSS via unsanitized SAPIrExtHelp URI input

Published Dec 14, 2021 · Updated Aug 4, 2024

Reflected XSS in SAP Knowledge Warehouse 7.30 through 7.50 allows remote attackers to execute script in a user's browser. The /SAPIrExtHelp endpoint reflects user-controlled URI input into its response without adequate validation or sanitization. Exploitation requires a user to follow a crafted link and permits temporary script execution in the SAP web interface's browser context.

CVSS severity6.1
Medium
EPSS probability22.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in SAP Knowledge Warehouse 7.30 through 7.50 allows remote attackers to execute script in a user's browser. The /SAPIrExtHelp endpoint reflects user-controlled URI input into its response without adequate validation or sanitization. Exploitation requires a user to follow a crafted link and permits temporary script execution in the SAP web interface's browser context.

The record

CVE
CVE-2021-42063
Published
Dec 14, 2021
Updated
Aug 4, 2024
Vendor
SAP SE
Product
SAP Knowledge Warehouse
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=< 7.30
  2. Affected versionversion=< 7.31
  3. Affected versionversion=< 7.40
  4. Affected versionversion=< 7.50

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP Knowledge Warehouseversion=< 7.30; version=< 7.31; version=< 7.40; version=< 7.50

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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