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CVE-2020-1947

41
FAUCET Score

CVE-2020-1947 is a critical remote code execution (RCE) vulnerability affecting Apache ShardingSphere (incubator) versions 4.0.0-RC3 and 4.0.0. The vulnerability stems from the ShardingSphere web console's use of the SnakeYAML library, which allows unmarshalling untrusted YAML inputs to Java types, leading to RCE. With a CVSS score of 9.8 (CRITICAL) and an EPSS score indicating high exploitability, this flaw presents a significant risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.0.0CPE matchmatch criteria
cpe:2.3:a:apache:shardingsphere:4.0.0:-:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:a:apache:shardingsphere:4.0.0:rc3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
33.92%
Probability of exploitation in next 30 days
EPSS Percentile
98.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3392 is in the 95th percentile among its peer group of 36,835 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.apache.shardingsphere:shardingsphereFixed in: 4.0.1

Vendor Advisories (1)

mavenGHSA-v54f-xcmp-43crhigh

Deserialization of Untrusted Data in Apache ShardingSphere

Feb 10, 2022

References

lists.apache.org / thread.html/r4a61a24c119bd820da6fb02100d286f8aae55c8f9b94a346b9bb27d8%40%3Cdev.shardingsphere.apache.org%3E
Vendor Advisory