A valid CSRF token is present in response to an invalid request
Priority LOW 39CWE-352Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-352.
Summary
Serv-U server responds with valid CSRFToken when the request contains only Session.
Why it matters now
EPSS 0.00787 56th percentileScored 2026-11-07
Fix Fixed Serv-U Server (SolarWinds): 15.2.5
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SolarWinds | Serv-U Server | 15.2.4 Hotfix 1 and previous versions to before 15.2.5 | 15.2.5 | Patch available | CNA |
- Serv-U Server VendorSolarWinds Affected 15.2.4 Hotfix 1 and previous versions to before 15.2.5 Fixed in 15.2.5 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:* | before 15.2.5 | Vulnerable | SolarWinds |
- cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:* Versions before 15.2.5 Vulnerable ·SolarWinds
Remediation
- Fix · CNA Serv-U Server (SolarWinds) Fixed in 15.2.5
Timeline
- 2026-10-02 Threatist record created from CVE-2021-35242
- 2026-10-03 Alias added: GHSA-vrh8-5phj-x6h2
References
More SolarWinds Serv-u vulnerabilities
- TI-2021-14105 Serv-U Remote Memory Escape Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2024-19183 SolarWinds Serv-U L Directory Transversal Vulnerability KEVCVSS 3.1HIGH 8.6
- TI-2026-22619 SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
- TI-2021-14139 Improper Input Validation Vulnerability in Serv-U KEVCVSS 3.1MEDIUM 5.3
- TI-2024-30693 SolarWinds Serv-U FTP Service Directory Traversal Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
- TI-2021-14142 Directory Transversal Vulnerability in Serv-U 15.3 CVSS 3.1HIGH 7.5
Sources
- CVE-2021-35242 · CVE Program
- CVE-2021-35242 · NVD
- FIRST EPSS
- GHSA-vrh8-5phj-x6h2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences