---
id: CVE-2020-15703
aliases:
  - GHSA-wpmr-q825-x4c6
  - PYSEC-2026-783
title: >-
  aptdaemon Information Disclosure via Improper Input Validation in Transaction
  class
summary: >-
  aptdaemon Information Disclosure via Improper Input Validation in Transaction
  class
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
vendor: aptdaemon
product: aptdaemon
ecosystem: pip
affected:
  - aptdaemon < 1.1.1
patched:
  - aptdaemon 1.1.1
published: '2022-05-24'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-wpmr-q825-x4c6'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2020-15703'
  - url: 'https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/1888235'
  - url: 'https://github.com/linuxmint/aptdaemon'
  - url: >-
      https://github.com/linuxmint/aptdaemon/blob/4d24cb61575ac6fbee8d5e61ef933e6093ee0a2e/debian/patches/CVE-2020-15703.patch
  - url: 'https://ubuntu.com/security/notices/USN-4537-1'
  - url: 'https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html'
tags:
  - osv
  - pip
epss: 0.0049
epssPercentile: 0.39552
ingestedAt: '2026-07-08T18:25:53.865Z'
---

## Overview

There is no input validation on the Locale property in an apt transaction. An unprivileged user can supply a full path to a writable directory, which lets aptd read a file as root. Having a symlink in place results in an error message if the file exists, and no error otherwise. This way an unprivileged user can check for the existence of any files on the system as root.

## Affected packages

- `aptdaemon < 1.1.1`

## Remediation

Upgrade to a patched release:

- `aptdaemon 1.1.1`