How severe is CVE-2021-33691?

CVE-2021-33691 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-33691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33691?

CVE-2021-33691 primarily affects Sap Netweaver Development Infrastructure. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33691?

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

When was CVE-2021-33691 published?

CVE-2021-33691 was published on 2021-09-15 and last updated on 2026-06-17.

CVE-2021-33691

CVE-2021-33691 is a medium-severity vulnerability in Sap Netweaver Development Infrastructure with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sap Netweaver Development Infrastructure
Published: 2021-09-15
Last modified: 2026-06-17

Description

NWDI Notification Service versions - 7.31, 7.40, 7.50, does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability.SAP NetWeaver Development Infrastructure Notification Service allows a threat actor to send crafted scripts to a victim. If the victim has an active session when the crafted script gets executed, the threat actor could compromise information in victims session, and gain access to some sensitive information also.

Frequently asked questions

What is CVE-2021-33691?: NWDI Notification Service versions - 7.31, 7.40, 7.50, does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability.SAP NetWeaver Development Infrastructure Notification Service allows a threat actor to send crafted scripts to a victim. If the victim has an active session when the crafted script gets executed, the threat actor could compromise information in victims session, and gain access to some sensitive information also.
How severe is CVE-2021-33691?: CVE-2021-33691 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-33691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33691?: CVE-2021-33691 primarily affects Sap Netweaver Development Infrastructure. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33691?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33691 published?: CVE-2021-33691 was published on 2021-09-15 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:sap:netweaver_development_infrastructure:7.31:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_development_infrastructure:7.40:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_development_infrastructure:7.50:*:*:*:*:*:*:*

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