AjaxPro .NET Class deserialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in AjaxPro. The impacted element is an unknown function of the component .NET Class Handler. The manipulation results in deserialization. This vulnerability is cataloged as CVE-2021-23758. The attack may be launched remotely. Furthermore, there is an exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical has been found in AjaxPro (affected version unknown). Affected is an unknown functionality of the component .NET Class Handler. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 12/04/2021. The advisory is shared for download at snyk.io. This vulnerability is traded as CVE-2021-23758 since 01/08/2021. Technical details are unknown but an exploit is available.

It is declared as attacked. This issue was added on 08/26/2026 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 09/09/2026:

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BO

Applying the patch b0e63be5f0bb20dfce507cb8a1a9568f6e73de57 is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 8.1
CNA Vector (Snyk): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: b0e63be5f0bb20dfce507cb8a1a9568f6e73de57

Timelineinfo

01/08/2021 🔍
12/04/2021 +330 days 🔍
12/04/2021 +0 days 🔍
08/27/2026 +1727 days 🔍

Sourcesinfo

Advisory: b0e63be5f0bb20dfce507cb8a1a9568f6e73de57
Status: Confirmed

CVE: CVE-2021-23758 (🔍)
GCVE (CVE): GCVE-0-2021-23758
GCVE (VulDB): GCVE-100-187524
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/04/2021 01:08
Updated: 08/27/2026 21:48
Changes: 12/04/2021 01:08 (48), 12/09/2021 08:11 (2), 12/09/2021 08:12 (18), 08/26/2026 22:37 (25), 08/27/2026 21:48 (1)
Complete: 🔍
Cache ID: 216::103

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