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CVE-2020-13942

77
FAUCET Score

CVE-2020-13942 is a critical vulnerability affecting Apache Unomi versions prior to 1.5.2, allowing unauthenticated attackers to inject malicious OGNL or MVEL scripts into the /context.json endpoint. This flaw carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability. While not listed on KEV or the Hot List, and with no reported active exploitation, public Nuclei templates exist for Remote Code Execution, indicating readily available exploit code. Community discussion and media coverage are minimal, which is typical for the vast majority of CVEs.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.5.0, < 1.5.2CPE matchmatch criteria
cpe:2.3:a:apache:unomi:*:*:*:*:*:*:*:*

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
68.40%
Probability of exploitation in next 30 days
EPSS Percentile
99.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2020-13942 · Nov 19, 2020
This CVE's current EPSS score of 0.6840 is in the 97th 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.apache.unomi:unomiFixed in: 1.5.2

Vendor Advisories (1)

mavenGHSA-xp5j-wj4h-2jq9critical

Injection and Improper Input Validation in Apache Unomi

Feb 10, 2022

References

advisory.checkmarx.net / advisory/CX-2020-4284
ExploitThird Party Advisory
lists.apache.org / thread.html/r08a4057ff7196b8880117edaa4b6207cbd36ed692d8dd1f5a56b4d0f%40%3Cannounce.apache.org%3E
lists.apache.org / thread.html/r4a8fa91836687eaca42b5420a778ca8c8fd3a3740e4cf4401acc9118%40%3Cdev.unomi.apache.org%3E
lists.apache.org / thread.html/r4a8fa91836687eaca42b5420a778ca8c8fd3a3740e4cf4401acc9118%40%3Cusers.unomi.apache.org%3E
lists.apache.org / thread.html/r79672c25e0ef9bb4b9148376281200a8e61c6d5ef5bb705e9a363460%40%3Ccommits.unomi.apache.org%3E
lists.apache.org / thread.html/rcb6d2eafcf15def433aaddfa06738e5faa5060cef2647769e178999a%40%3Cdev.unomi.apache.org%3E
lists.apache.org / thread.html/rcb6d2eafcf15def433aaddfa06738e5faa5060cef2647769e178999a%40%3Cusers.unomi.apache.org%3E
unomi.apache.org. / security/cve-2020-13942.txt
Mailing ListVendor Advisory
openwall.com / lists/oss-security/2020/11/24/5
Mailing ListThird Party Advisory