How severe is CVE-2021-21489?

CVE-2021-21489 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-21489 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21489?

CVE-2021-21489 primarily affects Sap Netweaver Enterprise Portal. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21489?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21489 published?

CVE-2021-21489 was published on 2021-09-14 and last updated on 2026-06-17.

CVE-2021-21489

CVE-2021-21489 is a medium-severity vulnerability in Sap Netweaver Enterprise Portal with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sap Netweaver Enterprise Portal
Published: 2021-09-14
Last modified: 2026-06-17

Description

SAP NetWeaver Enterprise Portal versions - 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, does not sufficiently encode user related data, resulting in Stored Cross-Site Scripting (XSS) vulnerability. This would allow an attacker with administrative privileges to store a malicious script on the portal. The execution of the script content by a victim registered on the portal could compromise the confidentiality and integrity of portal content.

Frequently asked questions

What is CVE-2021-21489?: SAP NetWeaver Enterprise Portal versions - 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, does not sufficiently encode user related data, resulting in Stored Cross-Site Scripting (XSS) vulnerability. This would allow an attacker with administrative privileges to store a malicious script on the portal. The execution of the script content by a victim registered on the portal could compromise the confidentiality and integrity of portal content.
How severe is CVE-2021-21489?: CVE-2021-21489 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-21489 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21489?: CVE-2021-21489 primarily affects Sap Netweaver Enterprise Portal. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21489?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21489 published?: CVE-2021-21489 was published on 2021-09-14 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:sap:netweaver_enterprise_portal:7.10:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_enterprise_portal:7.11:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_enterprise_portal:7.20:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_enterprise_portal:7.30:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_enterprise_portal:7.31:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_enterprise_portal:7.40:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_enterprise_portal:7.50:*:*:*:*:*:*:*

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