Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'ao_post_preload' Meta Value
Summary
| CVE | CVE-2026-2352 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-21 00:16:25 UTC |
| Updated | 2026-04-22 21:32:08 UTC |
| Description | The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ao_post_preload' meta value in all versions up to, and including, 3.1.14. This is due to insufficient input sanitization in the `ao_metabox_save()` function and missing output escaping when the value is rendered into a `<link>` tag in `autoptimizeImages.php`. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, granted the "Image optimization" or "Lazy-load images" setting is enabled in the plugin configuration. |
Risk And Classification
Primary CVSS: v3.1 6.4 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
EPSS: 0.000210000 probability, percentile 0.056550000 (date 2026-04-22)
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Optimizingmatters | Autoptimize | affected 3.1.14 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.14/classes/autoptimizeImages.php | [email protected] | plugins.trac.wordpress.org | |
| github.com/futtta/autoptimize/commit/60d1e487e536a97ae317784f8aeaf0d2e93... | [email protected] | github.com | |
| plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.14/classes/autoptimizeMetabox.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/autoptimize/trunk/classes/autoptimizeMetabox.php | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/5f3f9891-710e-49e4-b388-aa6d9... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/autoptimize/trunk/classes/autoptimizeImages.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.14/classes/autoptimizeImages.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Hung Nguyen (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-02-11T16:53:35.000Z | Vendor Notified |
| CNA | 2026-03-20T00:00:00.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.