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There is no verified HEIC-specific WordPress remote-code-execution claim in the official sources cited here. The WordPress advisory instead describes an authenticated malicious PostScript upload affecting certain sites that use Imagick and Ghostscript. WordPress documents HEIC conversion as a separate media workflow; it does not connect HEIC uploads to that vulnerability.
What the WordPress RCE advisory actually covers
The August 12, 2026 WordPress advisory describes remote code execution through a malicious PostScript file uploaded by a user with an Author-level account or higher. The affected setup uses Imagick and Ghostscript on the server; the advisory identifies Ghostscript’s handling of certain embedded files as the underlying weakness. Read the WordPress advisory.
- File type named: PostScript, not HEIC.
- Account access named: Author level or higher.
- Server components named: Imagick and Ghostscript.
- Underlying issue: Ghostscript handling of certain embedded files.
This is not a claim that every WordPress site, every image upload, or every account is vulnerable. The advisory describes a specific combination of upload access and server-side image-processing components.
Can a HEIC image hack a WordPress site?
The cited official advisory does not establish that a malicious HEIC image triggers this RCE. WordPress’s documentation describes a separate workflow: supported browsers convert HEIC inputs to JPEG before upload and retain the original as a companion file. The documentation explains that client-side processing can help where server-side HEIC support is unavailable; it does not connect that workflow to the PostScript vulnerability. See WordPress’s Client-Side Media Processing in WordPress 7.1 announcement and the Client-Side Media Processing handbook.
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Accordingly, the HEIC-specific wording in the title’s premise should not be treated as verified. The available official material is not proof that no HEIC-related vulnerability could exist; it simply does not substantiate one. A separate advisory or primary technical report would be needed to make that claim.
Which WordPress version fixes the documented upload RCE?
WordPress published security release 7.0.4 on August 12, 2026, and the release identifies a fix for authenticated Author-or-higher remote code execution via malicious file upload on sites using Imagick and Ghostscript. WordPress also issued patched releases for earlier branches. Install the patched release that matches your branch; do not assume that a version number from another branch is the right target.
| WordPress branch | Patched release listed in the advisory |
|---|---|
| 7.0 | 7.0.4 |
| 6.9 | 6.9.7 |
| 6.8 | 6.8.8 |
| 6.7 | 6.7.7 |
| 6.6 | 6.6.7 |
| 6.5 | 6.5.10 |
| 6.4 | 6.4.10 |
| 6.3 | 6.3.10 |
| 6.2 | 6.2.11 |
| 6.1 | 6.1.12 |
| 6.0 | 6.0.14 |
| 5.9 | 5.9.16 |
| 5.8 | 5.8.15 |
| 5.7 | 5.7.17 |
| 5.6 | 5.6.19 |
| 5.5 | 5.5.20 |
| 5.4 | 5.4.21 |
| 5.3 | 5.3.23 |
| 5.2 | 5.2.26 |
| 5.1 | 5.1.24 |
| 5.0 | 5.0.27 |
| 4.9 | 4.9.31 |
| 4.8 | 4.8.30 |
| 4.7 | 4.7.35 |
These are the patched versions listed by the advisory, not a statement that every listed branch is currently maintained or the right choice for every site. Check the advisory for the applicable branch and current release information.
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- Identify your installed branch. In the WordPress dashboard, open Dashboard > Updates and check the installed version.
- Apply the matching security release. Use the Dashboard’s Updates screen or obtain the release from WordPress.org, as directed in the WordPress 7.0.4 release announcement. The announcement recommends updating immediately because this is a security release.
- Check the relevant server configuration. Ask your host or administrator whether the site uses Imagick and Ghostscript for server-side processing. Those components are part of the configuration described in the advisory.
Changing HEIC upload settings alone is not the documented fix. The corrective action specified by WordPress is installing the patched release for the applicable branch.
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