CVE-2018-20133 json
Code injection in ymlref
published 2018-12-17 7 y ago modified 2026-06-17 4 mo ago also GHSA-8r8j-xvfj-36f9 , PYSEC-2018-103 , EUVD-2018-0147
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
ymlref allows code injection.
Exploit prediction
1.83% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/dexter2206/ymlref/issues/2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | ymlref | <=0.1.1 all versions |
no fix listed |
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/dexter2206/ymlref/issues/2
web, exploit, third-party-advisory, report
-
nvd.nist.gov
/vuln/detail/CVE-2018-20133
advisory
-
github.com
/dexter2206/ymlref
package
-
github.com
/pypa/advisory-database/tree/main/vulns/ymlref/PYSEC-2018-103.yaml
web
-
github.com
/advisories/GHSA-8r8j-xvfj-36f9
advisory
Sources
- CVE List CVE-2018-20133
- GitHub Advisory GHSA-8r8j-xvfj-36f9
- NVD CVE-2018-20133
- OSV PYSEC-2018-103
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.