CVE-2021-46703
Code injection in RazorEngine
In the IsolatedRazorEngine component of Antaris RazorEngine through 4.5.1-alpha001, an attacker can execute arbitrary .NET code in a sandboxed environment (if users can externally control template contents). NOTE: This vulnerability only affects products that are no longer supported by the maintainer
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In the IsolatedRazorEngine component of Antaris RazorEngine through 4.5.1-alpha001, an attacker can execute arbitrary .NET code in a sandboxed environment (if users can externally control template contents). NOTE: This vulnerability only affects products that are no longer supported by the maintainer
- Record
CVE-2021-46703- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
In the IsolatedRazorEngine component of Antaris RazorEngine through 4.5.1-alpha001, an attacker can execute arbitrary .NET code in a sandboxed environment (if users can externally control template contents). NOTE: This vulnerability only affects products that are no longer supported by the maintainer
- Record
CVE-2021-46703- Updated
- 2026-11-02
EUVDEUVD-2022-1498 No score
In the IsolatedRazorEngine component of Antaris RazorEngine through 4.5.1-alpha001, an attacker can execute arbitrary .NET code in a sandboxed environment (if users can externally control template contents). NOTE: This vulnerability only affects products that are no longer supported by the maintainer
- Record
EUVD-2022-1498- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-ph3v-2hq5-5qfq
Code injection in RazorEngine
In the IsolatedRazorEngine component of Antaris RazorEngine through 4.5.1-alpha001, an attacker can execute arbitrary .NET code in a sandboxed environment (if users can externally control template contents). NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
GHSA-ph3v-2hq5-5qfq- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1336
- Updated
- 2026-11-02
OSV
In the IsolatedRazorEngine component of Antaris RazorEngine through 4.5.1-alpha001, an attacker can execute arbitrary .NET code in a sandboxed environment (if users can externally control template contents). NOTE: This vulnerability only affects products that are no longer supported by the maintainer
- Record
CVE-2021-46703- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-ph3v-2hq5-5qfq
Code injection in RazorEngine
In the IsolatedRazorEngine component of Antaris RazorEngine through 4.5.1-alpha001, an attacker can execute arbitrary .NET code in a sandboxed environment (if users can externally control template contents). NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
GHSA-ph3v-2hq5-5qfq- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1336
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
RazorEngineNuGet |
through 4.5.1-alpha001 | None known |
RazorEngineNuGet |
through 4.5.1-alpha001, plus listed versions 2.1.03.0.03.0.33.0.43.0.5 Show 45 moreShow less3.0.63.0.73.0.83.1.03.10.03.10.1-alpha0013.2.03.3.03.4.03.4.13.4.23.5.03.5.0-beta13.5.0-beta23.5.0-beta33.5.13.5.23.5.33.6.03.6.13.6.23.6.33.6.3-beta13.6.3-beta23.6.43.6.53.6.5-beta13.6.63.6.6-beta13.6.6-beta23.7.03.7.0-beta13.7.1-alpha13.7.23.7.33.7.43.7.53.7.5-beta13.7.5-beta23.7.63.7.73.8.03.8.13.8.23.9.0 |
None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | BenEdridge/CVE-2021-46703 | 2023-05-07 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-46703 is a critical vulnerability (CVSS 9.8) in Razorengine Project Razorengine, published March 6, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.86%, the 79th percentile. No source names a fixed version.
References
Left out here: 33 versions. The JSON record has them.