Session fixation in Fortinet FortiWeb
Priority MEDIUM 46CWE-384Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-384.
Summary
A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01465 73rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Fortinet | FortiWeb | 6.4.0 – 6.4.2; 6.3.0 – 6.3.16; 6.2.0 – 6.2.6; 6.1.0 – 6.1.2; 6.0.0 – 6.0.7; 5.9.0 – 5.9.1; 5.8.5 – 5.8.7; 5.8.0 – 5.8.3; 5.7.0 – 5.7.3; 5.6.0 – 5.6.2 | — | No fix listed | CNA |
- FortiWeb VendorFortinet Affected 6.4.0 – 6.4.2; 6.3.0 – 6.3.16; 6.2.0 – 6.2.6; 6.1.0 – 6.1.2; 6.0.0 – 6.0.7; 5.9.0 – 5.9.1; 5.8.5 – 5.8.7; 5.8.0 – 5.8.3; 5.7.0 – 5.7.3; 5.6.0 – 5.6.2 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* | 5.6.0 to before 5.9.2; 6.0.0 to before 6.0.8; 6.1.0 to before 6.1.3; 6.2.0 to before 6.2.7; 6.3.0 to before 6.3.17; 6.4.0 to before 7.0.0 | Vulnerable | Fortinet |
- cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* Versions 5.6.0 to before 5.9.2; 6.0.0 to before 6.0.8; 6.1.0 to before 6.1.3; 6.2.0 to before 6.2.7; 6.3.0 to before 6.3.17; 6.4.0 to before 7.0.0 Vulnerable ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-42761
- 2026-10-03 Alias added: GHSA-hxmr-8629-frhp
References
More Fortinet Fortiweb vulnerabilities
- TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
- TI-2025-39856 Path traversal in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
- TI-2025-18919 SQL injection in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.8
- TI-2025-35886 OS command injection in Fortinet FortiWeb KEVCVSS 3.1MEDIUM 6.7
- TI-2021-05113 OS command injection in Fortinet FortiWeb CVSS 3.1HIGH 8.8
- TI-2021-18960 Stack-based buffer overflow in Fortinet FortiWeb CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-42761 · CVE Program
- CVE-2021-42761 · NVD
- FIRST EPSS
- GHSA-hxmr-8629-frhp · 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