CVE-2018-21234

Jodd before 5.0.4 performs Deserialization of Untrusted JSON Data when setClassMetadataName is set.

Published: 2020-05-21 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2018-21234 is rated High Risk (67.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 8.32%, 94th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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-2018-21234

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 2026-06-15 25.25% 8.32% -16.93%
2 2025-03-30 33.88% 25.25% -8.63%
3 2025-03-29 33.88%

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-21234

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
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.
3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
10.0 6.4 [email protected]

Weakness enumeration for CVE-2018-21234

GitHub Security Advisory for CVE-2018-21234

GHSA-jrg3-qq99-35g7 · Severity: critical · Ecosystem: maven — Deserialization of Untrusted Data in Jodd

OS Trackers for CVE-2018-21234

vendor priority summary link
ubuntu medium CVE-2018-21234 medium priority: Ubuntu including 1 source packages (jodd), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 9, ignored 5, needs-triage 3. https://ubuntu.com/security/CVE-2018-21234

Affected software / configurations for CVE-2018-21234

Vendor Product Version Raw CPE
jodd jodd < 5.0.4 cpe:2.3:a:jodd:jodd:*:*:*:*:*:*:*:*
apache hive 3.1.2 cpe:2.3:a:apache:hive:3.1.2:*:*:*:*:*:*:*

References for CVE-2018-21234

URL Tags
https://github.com/oblac/jodd/commit/9bffc3913aeb8472c11bb543243004b4b4376f16 Patch Third Party Advisory
https://github.com/oblac/jodd/compare/v5.0.3...v5.0.4 Third Party Advisory
https://github.com/oblac/jodd/issues/628 Third Party Advisory
https://lists.apache.org/thread.html/r0bacc701ab7105500a0ab2769270d18f332cb379e6a62ec7553f3327%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/r157d01c96a2c10e7ceb3e005f42c52cfe87b11dd018935e1c4277433%40%3Cgitbox.hive.apache.org%3E
https://lists.apache.org/thread.html/r317aec95c436848233047af7ecb3ce04ce446eb6031f981aef50df0d%40%3Cdev.drill.apache.org%3E
https://lists.apache.org/thread.html/r729bc1e0f367fe8a857ac8a14641dba284ac4cf5131edf483022cf59%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/r965503b27d67a2d934e34fc1d088c9547d51d927c43b8b9bd9b7e695%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/rc23200043872384e0fc48a4a4502f4c6b4b5ddc79ba4076414150d59%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/rc85b650b4ad2c77d7c39c69824488e40dce6d0ebbb4204777d094375%40%3Cgitbox.hive.apache.org%3E
https://lists.apache.org/thread.html/rd575d9877424a2d8776f5c2ff33bf3dc3382cd83f031d483f29c11ab%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/rdbb99b43334b59d3d3478d360c87e3235ba22edb1de7d39019194347%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/rdce006b282e56c5cc73cdf452c51c5097154d0503396d62f48abbeae%40%3Cgitbox.hive.apache.org%3E
https://lists.apache.org/thread.html/rf458683390d6650b26a2c8ba8ad396e038e520ad1cc3f3f1e20514d9%40%3Cdev.hive.apache.org%3E
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