AppCheck Security Blog

Security Advisory: Persistent XSS via Avatar Upload in Kentico CMS

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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Security Advisory: Persistent XSS via Avatar Upload in Kentico CMS

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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Umbraco Forms File Upload Vulnerability: Technical Analysis (CVE-2021-37334)

On the 15th of July 2021 Umbraco and AppCheck released a Security Advisory to alert users of a vulnerability within the Umbraco Forms component that could be exploited to gain remote code execution on the affected system.

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Advisory: CVE-2020-29045 - Unauthenticated RCE via Arbitrary Object Deserialisation in Five Star Restaurant Menu - WordPress Ordering Plugin

It is possible to gain Unauthenticated Remote Code Execution (RCE) on any WordPress instance that is using this plugin, due to the unsafe use of unserialize for the parsing of unsanitised user input, via the cookie fdm_cart used within includes/class-cart-manager.php

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Advisory: CVE-2020-29047 - Unauthenticated RCE via Arbitrary Object Deserialisation in WordPress Hotel Booking Plugin

CVE: CVE-2020-29047
Severity: HIGH
Vulnerability Type: CWE-502: Deserialization of Untrusted Data
Requires Authentication: No

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vBulletin Zero Day Details & Plug-in

Security researcher Amir Etemadieh has released a pre-authentication zero-day remote command execution (RCE) exploit in vBulletin. This exploit is bypasses the patch for a previous RCE in vBulletin 5.0 through 5.4 and has since been assigned CVE-2019-16759.

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SaltStack scanning tool to detect CVE-2020-11651 & CVE-2020-11652

These CVE's are now being actively exploited in the wild and so we have created a free standalone scanner to detect and report on these.

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Critical Vulnerabilities in SaltStack CVE-2020-11651 & CVE-2020-11652

Vulnerabilities within SaltStack infrastructure automation software may lead to RCE attacks and full system takeover. According to security researchers who found these vulnerabilities, attacks are expected in the wild as soon as today.

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GhostCat Vulnerability - CVE-2020-1938

Aside from being a – by all accounts truly terrible – direct-to-TV movie about a recently deceased cat who comes back from the dead to try and stop scammers and wealthy businessmen from making unnecessary land-development deals, “Ghostcat” is also the fond nickname for vulnerability CVE-2020-1938.

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AppCheck Scan Template for Pulse Secure CVE-2019-11510

AppCheck have released a scan template which will run a quicker scan and check for the above vulnerability. Specifically, the module will look to detect a critical security flaw in Pulse Secure’s Zero Trust Remote Access VPN.

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AppCheck Scan Template for Citrix Vulnerability CVE-2019-19781

AppCheck have released a scan template to detect a remote code execution flaw in Citrix appliances.

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