---
id: CVE-2025-63950
title: >-
  An insecure deserialization vulnerability exists in the download.php script of
  the to3k Twittodon application through commit
  b1c58a7d1dc664b38deb486ca290779621342c0b (2023-02-28)
summary: >-
  An insecure deserialization vulnerability exists in the download.php script of
  the to3k Twittodon application through commit
  b1c58a7d1dc664b38deb486ca290779621342c0b (2023-02-28). The 'obj' parameter
  receives base64-encoded data that is …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-502
vendor: tomaszdunia
product: twittodon
affected:
  - twittodon <= 2023-02-28
published: '2025-12-18'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T11:10:00.203'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-63950'
references:
  - url: >-
      https://github.com/solonbarroso/vulnerability-research/blob/main/advisories/Twittodon/CVE-2025-63950.md
    label: cve@mitre.org
  - url: >-
      https://github.com/solonbarroso/vulnerability-research/blob/main/advisories/Twittodon/CVE-pending-Deserialization.md
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00531
epssPercentile: 0.43229
ingestedAt: '2026-10-13T11:23:51.141Z'
---

## Overview

An insecure deserialization vulnerability exists in the download.php script of the to3k Twittodon application through commit b1c58a7d1dc664b38deb486ca290779621342c0b (2023-02-28). The 'obj' parameter receives base64-encoded data that is passed directly to the unserialize() function without validation. This allows a remote, unauthenticated attacker to inject arbitrary PHP objects, leading to a denial of service.

## Affected

- `twittodon <= 2023-02-28`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.