Menu
Hackers exploit critical vulnerability in popular WordPress theme component

Hackers exploit critical vulnerability in popular WordPress theme component

WordPress admins should check if their sites use the Slider Revolution plug-in and update it immediately, researchers said

Attackers are actively exploiting a critical vulnerability in a WordPress plug-in that's used by a large number of themes, researchers from two security companies warned Wednesday.

The vulnerability affects versions 4.1.4 and older of Slider Revolution, a commercial WordPress plug-in for creating mobile-friendly content display sliders. The flaw was fixed in Slider Revolution 4.2 released in February, but some themes -- collections of files or templates that determine the overall look of a site -- still bundle insecure versions of the plug-in.

The vulnerability can be exploited to execute a local file inclusion (LFI) attack that gives hackers access to a WordPress site's wp-config.php file, researchers from Web security firm Sucuri said in a blog post. This sensitive file contains database access credentials that can be used to compromise the whole site, the researchers said.

In February, ThemePunch, the developer of Slider Revolution, mentioned in the release notes of version 4.2 that a security issue had been fixed but didn't release any additional details about the problem or its impact.

Information about the vulnerability circulated on underground forums for several months, but on Sept. 1 someone posted a proof-of-concept exploit for it on a public site, including a list of WordPress themes that are likely affected, security researchers from Trustwave said Wednesday in a blog post. "Our web honeypots picked up increased scanning activity today."

Sucuri researchers also observed attempts to exploit the vulnerability. "Today alone, there were 64 different IP addresses trying to trigger this vulnerability on more than 1,000 different websites within our environment," they said.

Slider Revolution is sold via CodeCanyon.net, an online market for Web scripts and other components. The plug-in is bought by regular site owners, but also by WordPress theme developers who then bundle it inside their products to enable content slider functionality.

The problem is that when bundled with themes, Slider Revolution's automatic update mechanism is typically disabled. Users then have to rely on theme authors to update the plug-in along with their themes, which in many cases doesn't happen.

"We fix all issues within hours," a technical support representative for Damojo, the Cologne, Germany, company that owns ThemePunch, said Thursday via email. "As you know it is essential that all your plugins, WordPress and servers are always updated with the latest releases. Our direct customers do and can update their plugin regularly and automatically if they choose to."

"The main issue is that theme authors that bundled the slider within their theme did not update the plugin for their customers," the Damojo representative said. "The hint 'Security Fix' [in the release notes] should have ringed some bells. Why haven't they updated the plugin since February?"

The latest version of Slider Revolution is 4.6, released on Aug. 25, but this particular vulnerability only affects versions older than 4.2.

The Damojo representative advised users to check if their themes contain a vulnerable version of the plug-in and to contact the theme authors in case they do, adding that the company shouldn't be blamed for someone else's failures.

This incident highlights yet again the risks of insecure third-party code reuse, a widespread problem that affects all types of software, not just Web applications and WordPress themes.

Many developers use third-party components and libraries in their own software projects and fail to keep up with their security updates. This can lead to situations where a vulnerability is identified and fixed in a software package, but lingers on for months or years in other applications.


Follow Us

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags patch managementintrusiontrustwavepatchesExploits / vulnerabilitiesSucuriDamojo

Events

Featured

Slideshows

Meet the Reseller News 30 Under 30 Tech Awards 2020 winners

Meet the Reseller News 30 Under 30 Tech Awards 2020 winners

This year’s Reseller News 30 Under 30 Tech Awards were held as an integral part of the first entirely virtual Emerging Leaders​ forum, an annual event dedicated to identifying, educating and showcasing the New Zealand technology market’s rising stars. The 30 Under 30 Tech Awards 2020 recognised the outstanding achievements and business excellence of 30 talented individuals​, across both young leaders and those just starting out. In this slideshow, Reseller News honours this year's winners and captures their thoughts about how their ideas of leadership have changed over time.​

Meet the Reseller News 30 Under 30 Tech Awards 2020 winners
Reseller News Exchange Auckland: Beyond the myths — how partners can master cloud security

Reseller News Exchange Auckland: Beyond the myths — how partners can master cloud security

This exclusive Reseller News Exchange event in Auckland explored the challenges facing the partner community on the cloud security frontier, as well as market trends, customer priorities and how the channel can capitalise on the opportunities available. In association with Arrow, Bitdefender, Exclusive Networks, Fortinet and Palo Alto Networks. Photos by Gino Demeer.

Reseller News Exchange Auckland: Beyond the myths — how partners can master cloud security
Reseller News welcomes industry figures at 2020 Hall of Fame lunch

Reseller News welcomes industry figures at 2020 Hall of Fame lunch

Reseller News welcomed 2019 inductees - Leanne Buer, Ross Jenkins and Terry Dunn - to the fourth running of the Reseller News Hall of Fame lunch, held at the French Cafe in Auckland. The inductees discussed the changing face of the IT channel ecosystem in New Zealand and what it means to be a Reseller News Hall of Fame inductee. Photos by Gino Demeer.

Reseller News welcomes industry figures at 2020 Hall of Fame lunch
Show Comments