CVE-2020-22083
CVE-2020-22083 is a critical-severity vulnerability in Jsonpickle Project Jsonpickle with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 6% (93rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-502
- Affected product: Jsonpickle Project Jsonpickle
- Published:
- Last modified:
Description
jsonpickle through 1.4.1 allows remote code execution during deserialization of a malicious payload through the decode() function. Note: It has been argued that this is expected and clearly documented behaviour. pickle is known to be capable of causing arbitrary code execution, and must not be used with un-trusted data
Frequently asked questions
- What is CVE-2020-22083?
- jsonpickle through 1.4.1 allows remote code execution during deserialization of a malicious payload through the decode() function. Note: It has been argued that this is expected and clearly documented behaviour. pickle is known to be capable of causing arbitrary code execution, and must not be used with un-trusted data
- How severe is CVE-2020-22083?
- CVE-2020-22083 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-22083 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-22083?
- CVE-2020-22083 affects Jsonpickle Project Jsonpickle. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-22083?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-22083 published?
- CVE-2020-22083 was published on 2020-12-17 and last updated on 2026-06-17.
References
- https://access.redhat.com/security/cve/CVE-2020-22083
- https://gist.github.com/j0lt-github/bb543e77a1a10c33cb56cf23d0837874
- https://github.com/j0lt-github/python-deserialization-attack-payload-generator
- https://github.com/jsonpickle/jsonpickle/issues/332
- https://github.com/jsonpickle/jsonpickle/issues/332#issuecomment-747807494
- https://versprite.com/blog/application-security/into-the-jar-jsonpickle-exploitation/
Affected products (1)
- cpe:2.3:a:jsonpickle_project:jsonpickle:*:*:*:*:*:*:*:*
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