CVE-2021-33420 json
replicator vulnerable to Deserialization of Untrusted Data
published 2022-12-15 3 y ago modified 2026-06-17 4 mo ago also GHSA-hw46-vg6w-88fj , EUVD-2022-7653
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
A deserialization issue discovered in inikulin replicator before 1.0.4 allows remote attackers to run arbitrary code via the fromSerializable function in TypedArray object.
Patch / fix
- npm replicator 1.0.4
- replicator_project replicator 1.0.4
- github.com/inikulin/replicator@2c62624 commit
- github.com/inikulin/replicator#17 pull request
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 18 mo ago
Exploit prediction
1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- advisory.checkmarx.net https://advisory.checkmarx.net/advisory/CX-2021-4787 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 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 |
|---|---|---|---|
| npm | replicator | <1.0.4 |
1.0.4 |
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/inikulin/replicator/pull/17
web, third-party-advisory
-
github.com
/inikulin/replicator/commit/2c626242fb4a118855262c64b5731b2ce98e521b
web, patch, third-party-advisory
-
advisory.checkmarx.net
/advisory/CX-2021-4787
web, exploit, third-party-advisory
-
github.com
/inikulin/replicator/issues/16
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-33420
advisory
-
github.com
/inikulin/replicator
package
Sources
- CVE List CVE-2021-33420
- GitHub Advisory GHSA-hw46-vg6w-88fj
- NVD CVE-2021-33420
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.