How severe is CVE-2023-24621?

CVE-2023-24621 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-24621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-24621?

CVE-2023-24621 affects Esotericsoftware Yamlbeans. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-24621?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-24621 published?

CVE-2023-24621 was published on 2023-08-25 and last updated on 2026-06-17.

CVE-2023-24621

CVE-2023-24621 is a high-severity vulnerability in Esotericsoftware Yamlbeans with a CVSS 3.x base score of 7.8. 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: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Esotericsoftware Yamlbeans
Published: 2023-08-25
Last modified: 2026-06-17

Description

An issue was discovered in Esoteric YamlBeans through 1.15. It allows untrusted deserialisation to Java classes by default, where the data and class are controlled by the author of the YAML document being processed.

Frequently asked questions

What is CVE-2023-24621?: An issue was discovered in Esoteric YamlBeans through 1.15. It allows untrusted deserialisation to Java classes by default, where the data and class are controlled by the author of the YAML document being processed.
How severe is CVE-2023-24621?: CVE-2023-24621 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-24621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-24621?: CVE-2023-24621 affects Esotericsoftware Yamlbeans. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-24621?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-24621 published?: CVE-2023-24621 was published on 2023-08-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:esotericsoftware:yamlbeans:*:*:*:*:*:*:*:*

More vulnerabilities in Esotericsoftware Yamlbeans

CVE-2023-24620 — Medium (CVSS 5.5): An issue was discovered in Esoteric YamlBeans through 1.15. A crafted YAML document is able perform am XML Entity…

All CVEs affecting Esotericsoftware Yamlbeans →

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities

CVE-2026-41104 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Planetary Computer Pro allows an unauthorized attacker to disclose…
CVE-2026-43633 — Critical (CVSS 10.0): HestiaCP versions 1.9.0 through 1.9.4 contain a deserialization vulnerability in the web terminal component caused by a…
CVE-2026-33819 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
CVE-2026-20131 — Critical (CVSS 10.0): A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could…
CVE-2026-25632 — Critical (CVSS 10.0): EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water…
CVE-2025-14931 — Critical (CVSS 10.0): Hugging Face smolagents Remote Python Executor Deserialization of Untrusted Data Remote Code Execution Vulnerability.…

Browse all CWE-502 (Deserialization of Untrusted Data) vulnerabilities →