CVE-2021-23262 json
Snakeyaml deserialization vulnerability bypass
published 2021-12-02 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10361
- cvss
- 4.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
Authenticated administrators may modify the main YAML configuration file and load a Java class resulting in RCE.
Patch / fix
- Crafter Software Crafter CMS 3.1.13
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- Crafter Software Crafter CMS
Classification
- Weakness
-
- CWE-913 Improper Control of Dynamically-Managed Code Resources
References
-
docs.craftercms.org
/en/3.1/security/advisory.html#cv-2021120105
vendor-advisory
Sources
- CVE List CVE-2021-23262
- NVD CVE-2021-23262
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.