CVE-2021-23758High· 8.1▾ Abyssal⚠ Exploited in the wildPoC availableAll versions of package ajaxpro.2 are vulnerable to Deserialization of Untrusted Data due to the possibility of deserialization of arbitrary .NET classes, which can be abused to gain remote code execution.
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 44.6 · likelihood 16.7 · exploitation 25
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 2 sources. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Aug 26.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
Federal remediation due Sep 9, 2026
89%
1 GitHub repo · Metasploit ×1
Added to the CISA catalog on Aug 26, 2026. Federal remediation due Sep 9, 2026. View catalog ↗
All versions of package ajaxpro.2 are vulnerable to Deserialization of Untrusted Data due to the possibility of deserialization of arbitrary .NET classes, which can be abused to gain remote code execution.
ajaxpro.2 < 21.10.30.1Upgrade past the affected range:
ajaxpro.2 21.10.30.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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