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CVE Record

CVE-2021-33665: SAP NetWeaver Application Server ABAP (Applications based on SAP GUI for HTML), versions - KRNL64NUC - 7.49...

SAP NetWeaver Application Server ABAP (Applications based on SAP GUI for HTML), versions - KRNL64NUC - 7.49, KRNL64UC - 7.49,7.53, KERNEL - 7.49,7.53,7.77,7.81,7.84, does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a cross-site scripting issue in SAP NetWeaver Application Server ABAP applications using SAP GUI for HTML. A logged-in attacker could cause a user to interact with crafted content, leading to limited data exposure or UI manipulation in that user's browser. The public data rates it medium severity, not a full system compromise.

Executive priority

Treat as a scheduled SAP security maintenance item with higher priority for externally reachable systems. It is not reported as actively exploited here, but XSS in SAP business interfaces can still create user trust and data integrity risk.

Technical view

SAP NetWeaver AS ABAP for SAP GUI for HTML insufficiently encodes user-controlled input. CVSS 3.0 is 5.4: network reachable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.

Likely exposure

Exposure is likely limited to SAP NetWeaver AS ABAP systems running SAP GUI for HTML on the kernel lines and versions listed in the CVE record. Internet-facing SAP web access increases business relevance, but the source bundle does not state prevalence or default exposure.

Exploitation context

The bundle does not report active exploitation, and KEV status is false. Exploitation requires an authenticated low-privilege attacker and user interaction. The expected impact is browser-side script execution affecting confidentiality or integrity at a limited level.

Researcher notes

The source bundle lacks SAP Note content, CWE mapping, exploit details, and precise fixed versions. Analysis should stay tied to the CVE record, CVSS vector, affected SAP kernel entries, and vendor note reference until SAP advisory details are available.

Mitigation direction

  • Review SAP Security Note 3028370 for official remediation guidance.
  • Apply SAP-provided kernel or component updates applicable to affected systems.
  • Prioritize internet-facing or broadly accessible SAP GUI for HTML deployments.
  • Restrict access to SAP web interfaces where business requirements allow.
  • Monitor SAP change windows for kernel update completion.

Validation and detection

  • Inventory SAP NetWeaver AS ABAP systems using SAP GUI for HTML.
  • Compare installed kernel lines and versions against the CVE affected list.
  • Check whether SAP Security Note 3028370 is implemented or superseded.
  • Confirm SAP web interfaces are not unnecessarily exposed externally.
  • Review logs and user reports for suspicious browser-side behavior.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-33665 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.4 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.4CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.4Medium
CVSS 3.0 vector shape for CVE-2021-33665Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
SAP SESAP NetWeaver Application Server ABAP (Applications based on SAP GUI for HTML)< KRNL64NUC - 7.49, < KRNL64UC - 7.49, < 7.53, < KERNEL - 7.49, < 7.77, < 7.81, < 7.84Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.