Deserialization in Sap_se Sap Netweaver (Visual Composer Development Server)

CVE-2025-42999

SAP NetWeaver Visual Composer Metadata Uploader is vulnerable when a privileged user can upload untrusted or malicious content which, when deserialized, could potentially lead to a compromise of confidentiality, integrity, and availability…

Vulnerability class: Insecure Deserialization

EPSS: 0.386 (97.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-42999?
CVE-2025-42999 is a critical-severity vulnerability in Sap_se Sap Netweaver (Visual Composer Development Server), classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2025-05-13.
How severe is CVE-2025-42999?
Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-42999 known to be exploited?
Yes. CVE-2025-42999 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-05-15), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.