CVE-2018-3718 json
vercel/serve allows access to restricted files if filename is URL encoded.
published 2018-06-07 8 y ago modified 2026-06-17 4 mo ago also GHSA-5rc4-8qqh-vq7f , EUVD-2021-1580
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
Summary
serve node module suffers from Improper Handling of URL Encoding by permitting access to ignored files if a filename is URL encoded.
Patch / fix
Exploit prediction
1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- hackerone.com https://hackerone.com/reports/308721 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | serve | <6.5.2 |
6.5.2 |
Affected products
- HackerOne serve node module
Classification
- Weakness
-
- CWE-177 Improper Handling of URL Encoding (Hex Encoding)
References
-
hackerone.com
/reports/308721
web, exploit, patch, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-3718
advisory
-
github.com
/vercel/serve
package
Sources
- CVE List CVE-2018-3718
- GitHub Advisory GHSA-5rc4-8qqh-vq7f
- NVD CVE-2018-3718
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