SEPPMail's web frontend, user input is not embedded correctly in the web page and…
Priority MEDIUM 60CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
SEPPMail's web frontend, user input is not embedded correctly in the web page and therefore leads to cross-site scripting vulnerabilities (XSS).
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00459 40th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31740
- 2026-10-03 Alias added: GHSA-v7pm-56h6-94x6
References
More Seppmail vulnerabilities
- TI-2026-02349 SEPPmail User Web Interface Arbitrary File Write to RCE CVSS 4.0CRITICAL 10.0
- TI-2021-11767 The SEPPmail solution is vulnerable to a Cross-Site Scripting vulnerability (XSS)… CVSS 3.1MEDIUM 6.1
- TI-2026-21852 PDF Password CMDi CVSS 4.0CRITICAL 9.5
- TI-2026-21853 zip_attachments Path Traversal CVSS 4.0CRITICAL 9.3
- TI-2026-21854 S/MIME Decryption Tag Sanitization Bypass CVSS 4.0HIGH 8.2
- TI-2026-21855 Header Email Address Parsing CVSS 4.0HIGH 7.8
Sources
- CVE-2021-31740 · CVE Program
- CVE-2021-31740 · NVD
- FIRST EPSS
- GHSA-v7pm-56h6-94x6 · GitHub Advisory Database · CC BY 4.0
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