---
title: "Deprecation: #100639 - Deprecate AbstractPlugin"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-100639-1681740974"
source: "Changelog/12.4/Deprecation-100639-DeprecateAbstractPlugin.rst"
typo3-version: "12.4"
typo3-major: 12
type: "deprecation"
issue: 100639
forge: "https://forge.typo3.org/issues/100639"
tags: ["Frontend", "PHP-API", "FullyScanned", "ext:frontend"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Deprecation: #100639 - Deprecate AbstractPlugin {#deprecation-100639-1681740974}

See [forge#100639](https://forge.typo3.org/issues/100639)

## Description {#description}

Abstract "pibase" class `\TYPO3\CMS\Frontend\Plugin\AbstractPlugin`
has been marked @internal with
[changelog-Breaking-98281-MakeAbstractPluginInternal](https://docs.typo3.org/permalink/changelog:breaking-98281-1662549900) in TYPO3 v12.0
already and should not be used anymore.

It has now been fully deprecated with TYPO3 v12.4 and will be removed with TYPO3 v13.0.

## Impact {#impact}

Extending `AbstractPlugin` will trigger a deprecation level log warning
since TYPO3 v12.4. The class will be removed with TYPO3 v13.0.

## Affected installations {#affected-installations}

Instances with frontend plugin extensions that extend
`\TYPO3\CMS\Frontend\Plugin\AbstractPlugin` are affected.

The extension scanner will find usages with a strong match.

## Migration {#migration}

Stop extending the class. A simple way to migrate is by copying needed methods
over to an own controller class. See
[changelog-Breaking-98281-MakeAbstractPluginInternal](https://docs.typo3.org/permalink/changelog:breaking-98281-1662549900)
for more details on this.