XSS in Ajax.net Professional Project
CVE-2021-43853
Ajax.NET Professional (AjaxPro) is an AJAX framework available for Microsoft ASP.NET. Affected versions of this package are vulnerable to JavaScript object injection which may result in cross site scripting when leveraged by a malicious user. The affected core relates to JavaScript object creation when parsing json input. Releases before version 21.12.22.1 are affected. A workaround exists that replaces one of the core JavaScript files embedded in the library. See the GHSA-5q7q-qqw2-hjq7 for workaround details.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.008 (55.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Ajax.net Professional Project
- Michaelschwarz Ajax.net-Professional — versions < 21.12.22.1
Weakness classification (CWE)
References
- github.com/michaelschwarz/Ajax.NET-Professional/security/advisories/GHSA-5q7q-q… (Third Party Advisory, Mitigation)
- github.com/michaelschwarz/Ajax.NET-Professional/commit/c89e39b9679fcb8ab6644fe2… (Patch, Third Party Advisory)
- github.com/michaelschwarz/Ajax.NET-Professional/releases/tag/v21.12.22.1 (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2021-43853?
- CVE-2021-43853 is a high-severity vulnerability in Ajax.net Professional Project, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2021-12-22.
- How severe is CVE-2021-43853?
- High severity. CVSS v3 base score is 8.7 out of 10.