CVE-2021-20190

A flaw was found in jackson-databind before 2.9.10.7. FasterXML mishandles the interaction between serialization gadgets and typing. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Published: 2021-01-19 Last update: 2025-08-27 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-20190 is rated Moderate Risk (55.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.50%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-20190

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-23 0.63% 0.50% -0.13%
2 2026-05-22 0.50% 0.63% +0.13%
3 2026-04-24 — 0.50% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-20190

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
8.3 2.0 HIGH
AV:N/AC:M/Au:N/C:P/I:P/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 8.5 [email protected]

Weakness enumeration for CVE-2021-20190

GitHub Security Advisory for CVE-2021-20190

GHSA-5949-rw7g-wx7w · Severity: high · Ecosystem: maven — Deserialization of untrusted data in jackson-databind

OS Trackers for CVE-2021-20190

vendor priority summary link
debian not yet assigned CVE-2021-20190 not yet assigned priority: Debian including 1 source packages (jackson-databind), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-20190
redhat high — https://access.redhat.com/security/cve/CVE-2021-20190
suse high — https://www.suse.com/security/cve/CVE-2021-20190/
ubuntu medium CVE-2021-20190 medium priority: Ubuntu including 1 source packages (jackson-databind), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 6, needs-triage 5, ignored 4, released 1. https://ubuntu.com/security/CVE-2021-20190

Affected software / configurations for CVE-2021-20190

Vendor Product Version Raw CPE
fasterxml jackson-databind < 2.6.7.5 cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*
fasterxml jackson-databind >= 2.7.0, < 2.9.10.7 cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
netapp oncommand_api_services — cpe:2.3:a:netapp:oncommand_api_services:-:*:*:*:*:*:*:*
netapp oncommand_insight — cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
netapp service_level_manager — cpe:2.3:a:netapp:service_level_manager:-:*:*:*:*:*:*:*
apache nifi >= 1.7.0, <= 1.12.1 cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
oracle commerce_guided_search_and_experience_manager 11.3.2 cpe:2.3:a:oracle:commerce_guided_search_and_experience_manager:11.3.2:*:*:*:*:*:*:*

References for CVE-2021-20190

cvelogic Threat Intelligence