CVE-2026-15421
MEDIUM
MEDIUM
Priority: 0.03
BB Relevance:
63/100
Published: 2026-08-19
Modified: 2026-10-22
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Interaction
Scope Change
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
Low
UI:
None
S:
Changed
C:
Low
I:
Low
A:
None
Description
The Speed Optimizer – The All-In-One Performance-Boosting Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Image Tag Attributes in all versions up to, and including, 7.8.0 due to insufficient input sanitization and output escaping. 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. This is only exploitable when the site administrator has enabled the Lazy Load Media option in the plugin settings.