Vulnerable version of libwebp and can be exploited with a malicious source image
Impact
This vulnerability affects deployments of FreeImage that involve decoding or processing malicious source .webp files. If you only process your own trusted files, this should not affect you, but you should remove FreeImage from your project, as it is not maintained and presents a massive security risk.
If you are using FreeImage via ImageResizer.Plugins.FreeImage, please utilize Imageflow or Imageflow.Server instead, or upgrade to ImageResizer 5 and use ImageResizer.Plugins.Imageflow (enable Prereleases on NuGet to access).
FreeImage relies on Google's libwebp library to decode .webp images, and is affected by the recent zero-day out-of-bounds write vulnerability CVE-2023-4863 and https://github.com/advisories/GHSA-j7hp-h8jx-5ppr. The libwebp vulnerability also affects Chrome, Android, macOS, and other consumers of the library).
libwebp patched the vulnerability and released 1.3.2. FreeImage hasn't been updated since then and is presumed vulnerable.
Patches
None. FreeImage has not been updated in several years.
Workarounds
If you are using ImageResizer.Plugins.FreeImage, please utilize Imageflow or Imageflow.Server instead, or upgrade to ImageResizer 5 and use ImageResizer.Plugins.Imageflow (enable Prereleases on NuGet to access).
References
https://github.com/advisories/GHSA-j7hp-h8jx-5ppr https://nvd.nist.gov/vuln/detail/CVE-2023-4863 https://github.com/webmproject/libwebp/commit/2af26267cdfcb63a88e5c74a85927a12d6ca1d76 https://github.com/NoXF/libwebp-sys/commits/master
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | ImageResizer.Plugins.FreeImage | <= 4.2.8 | no fix |
References
- https://github.com/imazen/resizer/security/advisories/GHSA-wqcr-xm43-hpqr
- https://nvd.nist.gov/vuln/detail/CVE-2023-4863
- https://github.com/webmproject/libwebp/commit/2af26267cdfcb63a88e5c74a85927a12d6ca1d76
- https://github.com/NoXF/libwebp-sys/commits/master
- https://github.com/advisories/GHSA-j7hp-h8jx-5ppr
- https://github.com/imazen/resizer
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
-- Platform
- .NET (NuGet)
- Package
ImageResizer.Plugins.FreeImage- Disclosed
- 06.10.2023
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wqcr-xm43-hpqr - CC BY 4.0
Vulnerability history: ImageResizer.Plugins.FreeImage
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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