AEGLIX vulnerability intelligence
CVE-2026-5821
HIGH · CVSS 8.1 · Deferred
Published: 2026-07-02 · Updated: 2026-10-28 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T10:25:49.179164+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
The Image Optimizer plugin for WordPress is vulnerable to arbitrary file deletion in versions up to and including 1.7.4. This is due to insufficient path validation in the Image_Backup::remove() function where backup file paths stored in post meta are used directly in file deletion operations without verifying they are within the uploads directory. The plugin stores backup file paths in the image_optimizer_metadata post meta field and trusts these paths completely when deleting backups on the delete_attachment hook. An authenticated attacker with Author-level access can edit the image_optimizer_metadata post meta on their own attachments via WordPress's Custom Fields interface, injecting arbitrary absolute file paths into the backups array. When the attacker subsequently deletes the attachment, the plugin calls File_System::delete() on each path without validation. This makes it possible for authenticated attackers, with Author-level access and above, to delete arbitrary files on the server within the web server's filesystem permissions, potentially leading to denial of service, data loss, or security degradation.
Patch review priority
Assess exposure and vendor guidance
- No higher-priority signal is available in the current stored evidence.
FIRST EPSS: 0.66% · percentile 51.4 · score date 2026-10-27.
EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗
Severity and scoring
- CVSS score
- 8.1 · HIGH
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Weaknesses
- CWE-73
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Not listed in the CISA catalog retrieved for this record. This does not establish that exploitation has not occurred.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
NVD has not supplied affected-version configurations for this record. Check the vendor references below.
Advisories and references
- https://plugins.trac.wordpress.org/browser/image-optimization/tags/1.7.3/classes/image/image-backup.php#L117
- https://plugins.trac.wordpress.org/browser/image-optimization/tags/1.7.3/classes/image/image-meta.php#L97
- https://plugins.trac.wordpress.org/browser/image-optimization/tags/1.7.3/modules/backups/components/handle-backups-removing.php#L19
- https://plugins.trac.wordpress.org/browser/image-optimization/trunk/classes/image/image-backup.php#L117
- https://plugins.trac.wordpress.org/browser/image-optimization/trunk/classes/image/image-meta.php#L97
- https://plugins.trac.wordpress.org/browser/image-optimization/trunk/modules/backups/components/handle-backups-removing.php#L19
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3557772%40image-optimization&new=3557772%40image-optimization&sfp_email=&sfph_mail=
- https://research.cleantalk.org/cve-2026-5821
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a1a00374-e9d6-46f9-a28c-cb7768505787?source=cve