CVE-2020-13942
CriticalExploitedInjection and Improper Input Validation in Apache Unomi
Published Feb 10, 2022 · Updated Jul 8, 2026 · Also known as GHSA-xp5j-wj4h-2jq9
Key Facts
Patch immediately- CVE-2020-13942 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Unomi (Apache), org.apache.unomi:unomi (maven).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Apr 12, 2021. No public exploit code is known.
- EPSS estimates a 68% probability of exploitation in the next 30 days.
- Fixed versions are available, including Unomi 1.5.2, org.apache.unomi:unomi 1.5.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
68%
Higher than 99.3% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
None known
Get the full CVE-2020-13942 brief as a PDF
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Description
It is possible to inject malicious OGNL or MVEL scripts into the /context.json public endpoint. This was partially fixed in 1.5.1 but a new attack vector was found. In Apache Unomi version 1.5.2 scripts are now completely filtered from the input. It is highly recommended to upgrade to the latest available version of the 1.5.x release to fix this problem.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Apr 12, 2021 | n/a | Not reported |
| CIRCL KEV | Oct 14, 2023 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| UnomiApache | >= unspecified | 1.5.2 |
| org.apache.unomi:unomimaven | See advisory | 1.5.2 |
Patched Releases
Unomi
1.5.2
org.apache.unomi:unomi
1.5.2
Timeline
Added to Industry KEV feed
Apr 12, 2021
Publicly disclosed
Feb 10, 2022
Added to CIRCL KEV
Oct 14, 2023
Last updated
Jul 8, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2020-13942
- advisoryhttp://unomi.apache.org./security/cve-2020-13942.txt
- advisory[oss-security] 20201124 CVE-2020-13942: Remote Code Execution in Apache Unomi
- exploithttps://advisory.checkmarx.net/advisory/CX-2020-4284
FAQ
Common Questions.
It is possible to inject malicious OGNL or MVEL scripts into the /context.json public endpoint.
Affected: Unomi (Apache) versions >= unspecified; org.apache.unomi:unomi (maven). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Apr 12, 2021.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Unomi 1.5.2, org.apache.unomi:unomi 1.5.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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