What is 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 of the host system.
The record classifies CVE-2025-42999 under weakness class CWE-502. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 521 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.1 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - EPSS (FIRST)
- 12.7% probability of exploitation in the next 30 days, higher than 96.1% of all scored CVEs
- CISA KEV
- Listed since 2025-05-15, federal remediation deadline 2025-06-05 — used in known ransomware campaigns
- Threadlinqs priority
- 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
- Published
- 2025-05-13, last modified 2026-08-11
Is CVE-2025-42999 being exploited?
CISA added CVE-2025-42999 to the Known Exploited Vulnerabilities catalog on 2025-05-15, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2025-06-05 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2025-42999 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 47 in the Threadlinqs vulnerability feed.
- trickest/cve (trickest)
Affected products and versions
- SAP_SE: SAP NetWeaver (Visual Composer development server)
How to fix CVE-2025-42999
Because CVE-2025-42999 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2025-06-05. No vendor patch reference has been recorded for CVE-2025-42999 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2025-42999
1 tracked threat in the Threadlinqs corpus references CVE-2025-42999, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on .