# CVE-2020-1748: Incorrect Authorization in WildFly Elytron

> Attackers can bypass security manager checks to access secure resources without authentication, leading to information exposure in WildFly.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Sep 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-qgrq-cx4c-2rmm

## What is CVE-2020-1748?

CVE-2020-1748 is a high-severity missing authorization vulnerability in Wildfly, published on 16 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in all supported versions before wildfly-elytron-1.6.8.Final-redhat-00001, where the WildFlySecurityManager checks were bypassed when using custom security managers, resulting in an improper authorization. This flaw leads to information exposure by unauthenticated access to secure resources.

## Which versions are affected by CVE-2020-1748?

2 open source packages ship an affected version, including org.wildfly.security:wildfly-elytron. It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.wildfly.security:wildfly-elytron` | Maven | All versions | 1.6.8 |
| `org.wildfly.security:wildfly-elytron` | Maven | All versions | 1.6.8 |

Products: Redhat Decision Manager, Redhat Process Automation, Redhat Wildfly Elytron.

## How do I fix CVE-2020-1748?

Upgrade org.wildfly.security:wildfly-elytron to 1.6.8 or later.

## Is CVE-2020-1748 being exploited?

There is no known exploitation of CVE-2020-1748 in the wild and no public exploit code.

## Other vulnerabilities in Wildfly

- [CVE-2019-14841](https://insights.sbomify.com/CVE-2019-14841/): Privilege escalation in Business-central (high 8.8)
- [CVE-2022-1415](https://insights.sbomify.com/CVE-2022-1415/): Drools: unsafe data deserialization in streamutils (high 8.1)
- [CVE-2019-14840](https://insights.sbomify.com/CVE-2019-14840/): Information disclosure in Business-central (high 7.5)
- [CVE-2017-7545](https://insights.sbomify.com/CVE-2017-7545/): XML External Entity Reference in jbpmmigration (medium 6.5)
- [CVE-2019-14886](https://insights.sbomify.com/CVE-2019-14886/): Information disclosure in Business-central (medium 4.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-1748 and fix it if it is affected.

What it is: CVE-2020-1748 is a high-severity missing authorization vulnerability in Wildfly, published on 16 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-1748 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.wildfly.security:wildfly-elytron (Maven): affected all versions; fixed in 1.6.8
- org.wildfly.security:wildfly-elytron (Maven): affected all versions; fixed in 1.6.8

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-1748/ (Markdown: https://insights.sbomify.com/CVE-2020-1748/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-1748
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-1748
- OSV: https://osv.dev/vulnerability/CVE-2020-1748

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-1748/
Summaries are generated and may contain mistakes; the official description above is the record.