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CVE-2020-10991

29
FAUCET Score

CVE-2020-10991 is a critical XML External Entity (XXE) vulnerability affecting Mulesoft APIkit versions through 1.3.0, specifically due to a flaw in its RestXmlSchemaValidator. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network without authentication or user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. While no active exploits, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion have been observed, its high FAUCET Risk Score of 78/100 indicates a substantial inherent risk.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.0CPE matchmatch criteria
cpe:2.3:a:mulesoft:aplkit:*:*:*:*:*:*:*:*

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
1.25%
Probability of exploitation in next 30 days
EPSS Percentile
66.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0125 is in the 53rd percentile among its peer group of 36,862 CVEs.

Social Chatter

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.mule.modules:mule-apikit-moduleFixed in: 1.3.1

Vendor Advisories (1)

mavenGHSA-jffq-528j-mp6ccritical

Withdrawn Advisory: Improper Restriction of XML External Entity Reference in Mulesoft APIkit

May 24, 2022

References

github.com / mulesoft/apikit/issues/547
ExploitThird Party Advisory