Smoothwall Express 3.1 'outgoing.cgi' Cross-Site Scripting
Published Feb 16, 2026
5.1
MEDIUMCVSS 4.0
EPSS 0.23%
Description
Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains a reflected cross-site scripting vulnerability that allows attackers to inject malicious scripts by manipulating the MACHINE and MACHINECOMMENT parameters. Attackers can send POST requests to the outgoing.cgi endpoint with script payloads to execute arbitrary JavaScript in users' browsers and steal session data.
Affected products
-
- Version 3.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Smoothwall | Smoothwall Express | n/a |
|
- 3.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Feb 17, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Feb–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.23% (0.00234) | 12.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.22% (0.00225) | 12.92th | v5 (v2026.06.15) |
| Feb 17, 2026 | 0.03% (0.00029) | 7.69th | v4 (v2025.03.14) |
References (3)
- http://www.smoothwall.org product
- https://www.exploit-db.com/exploits/46333 exploitThird Party AdvisoryVDB Entry
- https://www.vulncheck.com/advisories/smoothwall-express-outgoingcgi-cross-site-scriptin third-party-advisoryBroken Link
| Link | Providers | Tags |
|---|---|---|
| http://www.smoothwall.org | product | |
| https://www.exploit-db.com/exploits/46333 | exploitThird Party AdvisoryVDB Entry | |
| https://www.vulncheck.com/advisories/smoothwall-express-outgoingcgi-cross-site-scriptin | third-party-advisoryBroken Link |
Change history (0)
No recorded changes yet.