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CVE-2023-24621

23
FAUCET Score

CVE-2023-24621 is a critical deserialization vulnerability affecting Esoteric YamlBeans through version 1.15, allowing untrusted deserialization of Java classes when processing specially crafted YAML documents. With a CVSS score of 7.8 (High), this vulnerability can lead to complete compromise of confidentiality, integrity, and availability if a user is tricked into processing a malicious YAML file. While no public exploits, Metasploit modules, or KEV entries exist, and community discussion is minimal, the inherent risk of untrusted deserialization remains significant.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.15CPE matchmatch criteria
cpe:2.3:a:esotericsoftware:yamlbeans:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 36th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

mavenGHSA-jm7r-4pg6-gf26high

Esoteric YamlBeans Unsafe Deserialization vulnerability

Aug 25, 2023

References

contrastsecurity.com
Third Party Advisory
github.com / Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md
ExploitThird Party Advisory
github.com / EsotericSoftware
Third Party Advisory