Scan all of your theme files for potentially malicious or unwanted code. Be aware of advertisements or dangerous JavaScript inserted into legitimate themes by third party theme download sites.
Future versions will allow to check for other theme vulnerabilities.
Download TAC (Current, v 1.4)
TAC in WordPress.org Plugin Directory
ABOUT
What TAC Does
TAC stands for Theme Authenticity Checker. Currently, TAC searches the source files of every installed theme for signs of malicious code. If such code is found, TAC displays the path to the theme file, the line number, and a small snippet of the suspect code. As of v1.3 TAC also searches for and displays static links.
Then what do you do? Just because the code is there doesn’t mean it’s not supposed to be or even qualifies as a threat, but most theme authors don’t include code outside of the WordPress scope and have no reason to obfuscate the code they make freely available to the web. We recommend contacting the theme author with the code that the script finds, as well as where you downloaded the theme.
The real value of this plugin is that you can quickly determine where code cleanup is needed in order to enjoy your theme.
History
TAC got its start when we repeatedly found obfuscated malicious code in free WordPress themes available throughout the web. A quick way to scan a theme for undesirable code was needed, so we put together this plugin.
After Googling and exploring on our own we came upon the article by Derek from 5thiryOne regarding this very subject. The deal is that many 3rd party websites are providing free WordPress themes with encoded script slipped in – some even going as far as to claim that decoding the gibberish constitutes breaking copyright law. The encoded script may contain a variety of undesirable payloads, such as promoting third party sites or even hijack attempts.
Frequently Asked Questions
What if I find something?
Contact the theme’s original author to double check if that section of code is supposed to be in the theme in the first place – chances are it shouldn’t as there isn’t a logical reason have obfuscated code in a theme.
If something is malicious or simply unwanted, TAC tells you what file to edit, you can even just click on the file path to be taken straight to the WordPress Theme Editor.
Why does TAC list static links?
First of all, static links aren’t necessarily bad, TAC just lists them so you can quickly see where your theme is linking to.
What about future vulnerabilities?
As we find them we will add them to TAC. If you find one, PLEASE let us know: Contact builtBackwards or post in the WordPress.org Forum
CHANGELOG
Version 1.4
- Compatible with WordPress 2.8!
- Tested in Firefox 3.0.11 and Internet Explorer 8
- JavaScript hiding/showing of theme details
Version 1.3 (Fixes + New Feature)
- Changed title to “Theme Authenticity Checker”, same acronym, makes more sense
- Compatible with WordPress 2.2 – 2.6.1
- NEW! Checks for embedded Static Links
- NEW! Direct links for editing suspicious files in the WordPress Theme Editor
- Improved the CSS
- Uses its own function to get theme file paths
Version 1.2 (Fixes)
- Band-aid fixes to theme file paths that were altered by the update to get_themes() in WordPress 2.6
- This release is only compatible with WordPress 2.6
Version 1.1 (Fixes)
- Style sheet doesn’t explode any more when certain threats are detected
- Modified code snippet output to prevent interfering with page structure
- Improved styling for slightly more appealing output
Version 1.0 (First Release)
- This is the initial release of TAC.
INSTALLATION
After downloading and extracting the latest version of TAC…
- Upload
tac.phpto the/wp-content/plugins/directory - Activate the plugin through the ‘Plugins’ menu in WordPress
- Go to Design -> TAC in the WordPress Admin
- The results of the scan will be displayed for each theme with the filename and line number of any threats.
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Thanks, I’ve been looking for this forever. I hate downloading themes and having them be ruined!! annoys me.
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Good on you guys for making this plugin. This is the type of thing that will keep the theme developers honest.
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Спасибо большое уважаемый Блоггер.
Твой блог просто сумашедший, а статья просто изумительная
Заходи ко мне на сайт)
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Just installed WP 2.9 RC1
TAC still works, but the little theme pictures are now all blank.
Thanks for the info, we’ll be sure to take care of the that before the full release.
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You have some great plugins on your post. Your insight and expertise would be a welcome addition to our new community, i hope you will consider joining, and thanks for sharing!
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Thanks for plugin. I’ve never heard about such possibility before. But I always was afraid about malicious code in themes.
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Hi there and thank you for a great plugin!
I would love it if the plugin could do a weekly check of the theme files and send an email alert to me if needed.
/Anders Saugstrup
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[...] Особенно удобно то, что плагин показывает файл с «вредоносной ссылкой», и дает возможность перейти к его редактированию сразу из своей админки. Скачить плагин Theme Authenticity Checker можно на странице автора [...]
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[...] 1,Theme Authenticity Checker 这个插件就是典型的必须出现的，现在WordPress流行了，需要主题的朋友多了，有一些垃圾就开始想在主题中动手脚了，比如加入一些第三方的垃圾代码，或者木马什么的，而这些东西WordPress初学者不会有任何的防备，所以就出现了许多的恶意事件，Wopus中文平台和Wopus中文社区都有过例子。 还有有人利用推荐广告主题的机会，把主题中的广告代码换成自己的，所以这个插件是很必须的，建议安装。既然说到了WordPress的安全性，酋长这里多推荐两篇文章： a,WP Security Scan—检查你的blog是否安全 b,WordPress安全白皮书 [...]
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[...] Authenticity Checker) do a search for the Plugin via WordPress as TAC or grab it off their web site http://builtbackwards.com/projects/tac/ once installed click the TAC link under Appearance when logged in to the Admin page of your [...]