Jun42021
managed securityCross-Site Scripting, XSS

XSS MAY 2021 - Cross-Site Scripting MAY 2021

Managed WordPress Security Report

Be informed about the latest Cross-Site Scripting MAY 2022, identified and reported publicly. As these XSS MAY 2021 vulnerabilities have a severe negative impact on any WordPress Security, consider our FREE security AUDIT.

An estimated jaw-dropping 2.176.000+ active WordPress installations are susceptible to this attack type, considering only the publicly available numbers. The estimated number can increase by 20-25% with premium versions as they are private purchases.

Furthermore, the initial estimation can triple if we consider (1) the already patched versions BUT NOT UPDATED by owners, as the vulnerability remains active within their domain; and (2) the closed "uncounted" versions remain active on domains already running the plugins, as nobody is maintaining security. As these owners start changing their hosting provider (due to constant unexplained issues), they actively migrate these vulnerabilities behind new / protected areas, possibly exposing other clean WP to different attack types.

It is a 109% increase compared to December 2020. We compare last month versus previous winter holiday season, which has the biggest shopping traffic and attack spike throughout the year. Read more about our previous report here: ALERT: 52 XSS APR 2021 – Cross-Site Scripting APR 2021 Blast and 11 XSS – Cross-Site Scripting – WordPress Security DEC. The following cases made headlines PUBLICLY just last month in the XSS MAY 2021 category:

  • Hana Flv Player <= 3.1.3 - Authenticated Stored Cross-Site Scripting (XSS)
    • Now you can easily embed the FLV Flash videos in your WordPress Blog. I have packaged the three FLV Flash player – OS FLV , FlowPlayer v2, v3, and v5 , and MediaElement.js (for HTML5 player support). So you can use them freely without worries even for the commercial purpose unlike the JW player. Active installations: 4,000+
  • PickPlugins Product Slider for WooCommerce < 1.13.22 - Reflected Cross-Site Scripting (XSS)
    • PickPlugins Product Slider is easy and user friendly carousel slider for WooCommerce products, You can create unlimited product slider by this plugin and display anywhere via shortcodes. We added layout builder for your product slider to build as you want, easy to customize and add your own CSS via layout editor you can build some fancy and unique layout. No coding is required to build custom layout and add elements to layout. we added tons of option to handle slider functionality to control slide speed, display or hide navigations and dots. Active installations: 20,000+
  • ReDi Restaurant Reservation < 21.0426 - Unauthenticated Stored Cross-Site Scripting (XSS)
    • The one and only fully automated reservation system. Real time available seats check with instant reservation confirmation for your guests. Don’t spent anymore time for manually reviewing and confirming reservations. Turn your web site visitors into restaurant’s guests. Don’t let your guest wait, surprise him with instant confirmation. Active installations: 1,000+
  • Smooth Scroll Page Up/Down Buttons < 1.4 - Authenticated Stored XSS
    • The Smooth Page Scroll Up/Down Buttons plugin for WordPress adds buttons to every page of your site, that can be used to (smoothly) scroll up or down exactly one screen/page at a time. This can be particularly handy for pages with a lot of text/content, or in cases wherever a browser’s scrollbar is just not good enough (or not present at all, like on tablets) to enable one-click, one-screen scrolling. Active installations: 5,000+

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Protect your WordPress from publicly reported cases of XSS MAY 2021 BEFORE IT’S TOO LATE! You will also protect your customers, your reputation and your online business!

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  • Weekly Schedule < 3.4.3 - Authenticated Stored XSS
    • The purpose of this plugin is to allow users to create one or more schedules of weekly events and display these schedule on one or more pages as tables. Users can style their schedules using stylesheets based on the category of items and can assign information to items that will be displayed in a tooltip. Active installations: 600+
  • WP Customer Reviews < 3.5.6 - Authenticated Stored Cross-Site Scripting (XSS)
    • There are many sites that are crawling for user-generated reviews now, including Google Places and Google Local Search. WP Customer Reviews allows you to setup a specific page on your blog to receive customer testimonials for your business/service OR to write reviews about a product. Active installations: 40,000+
  • Autoptimise < 2.8.4 - Authenticated Stored Cross-Site Scripting (XSS)
    • Autoptimise makes optimising your site really easy. It can aggregate, minify and cache scripts and styles, injects CSS in the page head by default but can also inline critical CSS and defer the aggregated full CSS, moves and defers scripts to the footer and minifies HTML. You can optimise and lazy-load images (with support for WebP and AVIF formats), optimise Google Fonts, async non-aggregated JavaScript, remove WordPress core emoji cruft and more. As such it can improve your site’s performance even when already on HTTP/2! Active installations: 1+ million

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Get Healthy, Stay Healthy! A healthier online business starts today and it begins with you. Let’s solve all your XSS MAY 2021 issues.

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BRIEF: Cross-Site Scripting MAY 2021 is a type of security vulnerability typically found in web applications. XSS attacks enable attackers to inject client-side scripts into web pages viewed by other users. A cross-site scripting vulnerability may be used by attackers to bypass access controls such as the same-origin policy.

xss may 2021 - cross-site scripting may 2021 blast

What is CROSS-SITE SCRIPTING MAY 2021?

Cross-Site Scripting (XSS) attacks are a type of injection, in which malicious scripts are injected into otherwise benign and trusted websites. XSS attacks occur when an attacker uses a web application to send malicious code, generally in the form of a browser side script, to a different end user. Flaws that allow these attacks to succeed are quite widespread and occur anywhere a web application uses input from a user within the output it generates without validating or encoding it.

An attacker can use XSS to send a malicious script to an unsuspecting user. The end user’s browser has no way to know that the script should not be trusted, and will execute the script. Because it thinks the script came from a trusted source, the malicious script can access any cookies, session tokens, or other sensitive information retained by the browser and used with that site. These scripts can even rewrite the content of the HTML page.

xss may 2021 - cross-site scripting may 2021 blast

What is the impact of a XSS MAY 2021 ATTACK?

The actual impact of an XSS attack generally depends on the nature of the application, its functionality and data, and the status of the compromised user. For example:

- In a simple public application, where all users are anonymous and all information is public, the impact will often be minimal. Nothing else to steal.
- In an application holding sensitive or private/personal data, such as banking transactions, emails, or healthcare records, the impact will usually be serious.
- If the compromised user has elevated privileges within the application, then the impact will generally be critical, allowing the attacker to take full control of the vulnerable application and compromise all users, owners and their data.

What kind of XSS attacks are exploited?

- Reflected XSS, where the malicious script comes from the current HTTP request.
- Stored XSS, where the malicious script comes from the website's database.
- DOM-based XSS, where the vulnerability exists in client-side code rather than server-side code.

 

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