CVE-2021-31740 json
SEPPMail's web frontend, user input is not embedded correctly in the web page and therefore leads to cross-site scripting vulnerabilities (…
published 2022-11-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18624
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
SEPPMail's web frontend, user input is not embedded correctly in the web page and therefore leads to cross-site scripting vulnerabilities (XSS).
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- pentagrid.ch https://www.pentagrid.ch/en/blog/multiple-vulnerabilities-in-seppmail/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
pentagrid.ch
/en/blog/multiple-vulnerabilities-in-seppmail/
exploit, third-party-advisory
Sources
- CVE List CVE-2021-31740
- NVD CVE-2021-31740
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