CVE-2025-31324: SAP NetWeaver (Visual Composer development server) · Unrestricted File Upload
Affects SAP NetWeaver (Visual Composer development server)Source CVE Database V5
Exploited in the wild · used in ransomware campaigns · KEV due 20 May 2025 · public detection template (Nuclei) · 99% EPSS : apply the vendor's fix or mitigations to SAP NetWeaver (Visual Composer development server) now.
Data as of 26 Oct 2026, 17:16 UTC
- KEV deadline
- US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
- Ransomware
- Used in ransomware campaigns
- EPSS
- 99.4% chance of exploitation in 30 days – higher than 99% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- Reliable evidence of use in the wild by real attackers
- Automatable
- Attackers can reliably automate steps 1–4 of the kill chain
- Technical impact
- Total control over the software or total information disclosure
CISA SSVC assessment, 2025-04-24.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 24 Apr 2025
Detectable: evidence found.
nuclei template: SAP NetWeaver Visual Composer Metadata Uploader - Deserialization
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 5 days after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by SAP SE
, 28 days before disclosure
CVE published
on cve.org
, t = 0
CISA SSVC assessment
exploitation active
, the same day as disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed · ransomware use known
, 5 days after disclosure
KEV remediation due
US federal deadline
, 26 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| SAP_SESAP NetWeaver (Visual Composer development server) | Affected
| Fixed in– |
Description
SAP NetWeaver Visual Composer Metadata Uploader is not protected with a proper authorization, allowing unauthenticated agent to upload potentially malicious executable binaries that could severely harm the host system. This could significantly affect the confidentiality, integrity, and availability of the targeted system.
References
- me.sap.com/notes/3594142 (opens in a new tab)
- url.sap/sapsecuritypatchday (opens in a new tab)
- onapsis.com/blog/active-exploitation-of-sap-vulnerability-cve-2025-31324/ (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-31324 (opens in a new tab)
- theregister.com/2025/04/25/sap_netweaver_patch/ (opens in a new tab)
- bleepingcomputer.com/news/security/sap-fixes-suspected-netweaver-zero-day-exploited-in-attacks/ (opens in a new tab)