AppCheck Security Blog

Security Advisory: Duplicate Post WordPress Plugin SQL Injection Vulnerability (CVE-2021-43408)

The AppCheck Research team identified a security flaw within the “Duplicate Post” WordPress plugin. The plugin has been downloaded 155,421 times at the time of writing. This blog post details the finding along with remediation advice.

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Security Advisory: Duplicate Post WordPress Plugin SQL Injection Vulnerability (CVE-2021-43408)

The AppCheck Research team identified a security flaw within the “Duplicate Post” WordPress plugin. The plugin has been downloaded 155,421 times at the time of writing. This blog post details the finding along with remediation advice.

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The current state of CSRF and should I still worry about it?

CSRF stands for “Cross Site Request Forgery” and is a term that is used to describe a situation in which an attacker tricks a computer user into submitting a web request that they are unaware of performing, that is performed under their identity, and which is typically against their interests. An example might be an instruction to their online bank to transfer money out of their account and into the attacker’s account. Since the action is performed from the victim’s computer, it is indistinguishable from a legitimate and intentional request made by the victim. This obviously sounds fairly alarming! Let’s dig deeper into the mechanisms that make this possible.

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Webinar: Authentication: Bypassed!

A brand new webinar in which we hope to build up an understanding of authentication vulnerabilities, working from the most basic to more intricate scenarios, sparing no detail whilst remaining accessible to non-technical audiences. Straight from the stage of the Digital Transformation Expo, this will be the debut of this webinar content.

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WordPress + Microsoft Office 365 / Azure AD | LOGIN Persistent Cross-Site Scripting (CVE-2021-43409)

The “WPO365 | LOGIN” WordPress plugin (up to and including version 15.3) by wpo365.com is vulnerable to a persistent Cross-Site Scripting (XSS) vulnerability (also known as Stored or Second-Order XSS).

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AppCheck Web Application Seminar November 2021 - LONDON

The Web Application Security seminar is a free event that presents a detailed analysis of the most common threats facing web applications today. We will review high profile examples and provide a technical breakdown of critical security flaws along with an introduction into emerging technologies.

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Secarma Automated Testing Podcast - Nick Blundell

In this episode, Nick Blundell – Head of R&D at AppCheck speaks with Holly Grace Williams from Secarma about the pros and cons of vulnerability scanning, how hackers can enter weak systems and the need for a blended approach.

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Apache 2.4.50 (CVE-2021-42013) & 2.4.49 (CVE-2021-41773) Remote Code Execution / Path Traversal Vulnerability

A previous version of this article recommended updating to 2.4.50 to address the vulnerability in 2.4.49, however the fix in 2.4.50 has been now been shown to be incomplete therefore it is recommended to update to 2.4.51.

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Reflecting on AppCheck: Taylor-Mae Nash

We have taken on lots of new starters at AppCheck across all departments as we continue to enjoy a period of expansion. We sit down with Taylor-Mae, our Client Services Executive, and ask her how her first few months with AppCheck have gone.

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OWASP Top 10 2021 Web Application Security Risks

Every few years the OWASP community come together to review the ten most critical web application security risks (commonly known simply as the “OWASP Top 10”) by analysing vulnerability data spanning hundreds of organisations and over 100,000 real world applications. This process was most recently performed in 2021 and a new, updated top 10 list published.

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Security Advisory: Persistent XSS via Avatar Upload in Kentico CMS (CVE-2021-43991)

The Kentico CMS (13.0.4001.0 Xperience platform version tested locally) is vulnerable to a persistent Cross-Site Scripting (XSS) vulnerability (also known as Stored or Second-Order XSS).

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