Loading vulnerability…
CVE-2021-23758 is an unsafe deserialization vulnerability in Ajax.NET Professional (AjaxPro). AjaxPro versions before 21.11.29.1 insufficiently validate attacker-controlled JSON type information during deserialization, allowing deserialization of arbitrary .NET classes. In commonly deployed configurations, exposed AjaxPro services, including the default ICartService class that accepts arbitrary objects, can make the issue remotely exploitable without authentication.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/windows/http/ajaxpro_deserialization_rce.rb) that exploits a remote code execution vulnerability (CVE-2021-23758) in Ajax.NET Professional (AjaxPro) for Windows. The exploit targets an insecure deserialization flaw in the AjaxPro JsonDeserializer, allowing attackers to execute arbitrary commands on the server by sending specially crafted JSON data to a vulnerable HTTP endpoint. The module supports both direct command execution and staged payloads (such as Meterpreter reverse shells), leveraging Metasploit's payload system. The exploit is weaponized, allowing for customizable payloads and automated exploitation. The main endpoints targeted are the AjaxPro handler paths (e.g., /ajaxpro/, /core.ashx, and the vulnerable namespace/method .ashx endpoint). The module is configurable for different namespaces, methods, and parameters, making it adaptable to various AjaxPro deployments. The repository is structured as a typical Metasploit exploit module, written in Ruby, and is intended for use within the Metasploit Framework.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
19 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Ajax.NET Professional (AjaxPro) insecure-deserialization vulnerability that can enable remote code execution via arbitrary .NET classes.
A deserialization-of-untrusted-data vulnerability in Ajax.NET Professional. It may be dangerous where attacker-controlled serialized data reaches application components without adequate validation.
A vulnerability in AjaxPro explicitly described as weaponized by UAT-10147 during the campaign.
A remote code execution vulnerability involving AjaxPro deserialization, exploited by UAT-10147 to compromise public-facing web applications.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.