Cross-site scripting in Sophos Firewall
Priority LOW 39CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from admin to super-admin in Sophos Firewall older than version 19.0 GA.
Why it matters now
EPSS 0.01093 65th percentileScored 2026-11-07
Fix Fixed Sophos Firewall (Sophos): 19.0 GA
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 |
|---|---|---|---|---|---|
| Sophos | Sophos Firewall | before 19.0 GA | 19.0 GA | Patch available | CNA |
- Sophos Firewall VendorSophos Affected before 19.0 GA Fixed in 19.0 GA Patch available CNA
Remediation
- Fix · CNA Sophos Firewall (Sophos) Fixed in 19.0 GA
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Sophos Firewall 19.0 GA
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-07520 Cross-site scripting in Sophos FirewallPriority LOW 38
Timeline
- 2026-10-02 Threatist record created from CVE-2021-25267
- 2026-10-03 Alias added: GHSA-5fg7-mh37-fjrv
References
More Sophos Firewall Firmware vulnerabilities
- TI-2025-06959 SQL injection in Sophos Firewall CVSS 3.1CRITICAL 9.8
- TI-2025-06088 OS command injection in Sophos Firewall CVSS 3.1CRITICAL 9.8
- TI-2024-11800 SQL injection in Sophos Firewall CVSS 3.1CRITICAL 9.8
- TI-2024-11801 A weak credentials vulnerability potentially allows privileged system access via SSH to… CVSS 3.1CRITICAL 9.8
- TI-2024-12980 A business logic vulnerability in the Up2Date component of Sophos Firewall older than… CVSS 3.1HIGH 8.1
- TI-2025-06724 OS command injection in Sophos Firewall CVSS 3.1HIGH 8.8
Sources
- CVE-2021-25267 · CVE Program
- CVE-2021-25267 · NVD
- FIRST EPSS
- GHSA-5fg7-mh37-fjrv · 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