CVE-2020-22083

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 6%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation6% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
92.7%
KEV
Not listed

Published

December 17, 2020

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Jun 7, 2026
Patch available. Sources: redhat.
generic

Jsonpickle decode() function unsafely form objects that can lead to Remote code execution · Issue #332 · jsonpickle/jsonpickle · GitHub

https://github.com/jsonpickle/jsonpickle/issues/332
generic

GitHub - j0lt-github/python-deserialization-attack-payload-generator: Peas create serialized payload for deserialization RCE attack on python driven applications where pickle ,pyYAML, ruamel.yaml or jsonpickle module is used for deserialization of serialized data. I will update it with more attack vectors to targets other modules. · GitHub

https://github.com/j0lt-github/python-deserialization-attack-payload-generator
generic

jsonpickle 1.4.2 vulnerable to RCE · GitHub

https://gist.github.com/j0lt-github/bb543e77a1a10c33cb56cf23d0837874
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2020-22083
generic

JSON Pickle Exploitation | Python's Pickle Module | VerSprite

https://versprite.com/blog/application-security/into-the-jar-jsonpickle-exploitation/
generic

Jsonpickle decode() function unsafely form objects that can lead to Remote code execution · Issue #332 · jsonpickle/jsonpickle · GitHub

https://github.com/jsonpickle/jsonpickle/issues/332#issuecomment-747807494

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipjsonpickle—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
jsonpickle0.0.1 ... 1.4.1 (30 versions)1.4.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:51 UTCEG score recompute
  4. 2026-07-22 22:37 UTCEG score recompute
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  21. 2026-07-12 21:37 UTCOSV refresh
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  1. 2026-07-08 15:12 UTCEPSS rescore
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  21. 2026-06-24 07:20 UTCOSV refresh
  22. 2026-06-23 21:31 UTCEPSS rescore
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  24. 2026-06-21 14:54 UTCEPSS rescore
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  44. 2026-06-07 15:23 UTCEPSS rescore
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  46. 2026-06-07 10:59 UTCOSV refresh
  47. 2026-06-05 22:45 UTCEPSS rescore
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  69. 2026-05-24 16:48 UTCEPSS rescore
  70. 2026-05-23 03:57 UTCEG score recompute
  71. 2026-05-23 03:57 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2020-22083?
CVE-2020-22083 is a critical vulnerability published on December 17, 2020. 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…
When was CVE-2020-22083 disclosed?
CVE-2020-22083 was first published in the National Vulnerability Database on December 17, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-22083 actively exploited?
CVE-2020-22083 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-22083?
CVE-2020-22083 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-22083?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-22083, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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