CVE-2018-17785 json
In blynk-server a Directory Traversal exists
published 2018-09-30 8 y ago modified 2026-06-17 4 mo ago also GHSA-4r64-wf76-c53p , EUVD-2018-0503
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
In blynk-server in Blynk before 0.39.7, Directory Traversal exists via a ../ in a URI that has /static or /static/js at the beginning, as demonstrated by reading the /etc/passwd file.
Patch / fix
- maven com.github.blynkkk:blynk-server 0.39.7
- blynk blynk-server 0.39.7
Exploit prediction
2.12% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/blynkkk/blynk-server/issues/1256 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | com.github.blynkkk:blynk-server | <0.39.7 |
0.39.7 |
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/blynkkk/blynk-server/issues/1256
web, exploit, issue-tracking, third-party-advisory
-
github.com
/blynkkk/blynk-server/releases/tag/v0.39.7
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-17785
advisory
-
github.com
/advisories/GHSA-4r64-wf76-c53p
advisory
-
github.com
/blynkkk/blynk-server
package
Sources
- CVE List CVE-2018-17785
- GitHub Advisory GHSA-4r64-wf76-c53p
- NVD CVE-2018-17785
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.