---
title: "CVE-2023-5256\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2023-5256?format=md
keywords: index, follow
---

# CVE-2023-5256

Publication date 28 September 2023

Last updated 4 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2023-5256?format=md#impact-score)

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## Description

In certain scenarios, Drupal's JSON:API module will output error
backtraces. With some configurations, this may cause sensitive information
to be cached and made available to anonymous users, leading to privilege
escalation.
This vulnerability only affects sites with the JSON:API module enabled, and
can be mitigated by uninstalling JSON:API.
The core REST and contributed GraphQL modules are not affected.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| drupal7 | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release |
| 25.04 plucky | Not in release |
| 24.10 oracular | Not in release |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 16.04 LTS xenial | Needs evaluation |
| 14.04 LTS trusty | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | High |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5256)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-5256)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-5256)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-5256)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2023-5256>