EUVD-2026-62219
GHSA-8r64-rxjj-mp32
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Stored XSS requires victim page access (UI:R not UI:N); PR:L reflects mandatory contributor authentication; S:C captures cross-origin browser execution.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Stored Cross-Site Scripting in the SiteGround Speed Optimizer WordPress plugin (all versions through 7.8.0) allows authenticated contributors to inject persistent malicious JavaScript via unsanitized image tag attributes, executing in any visitor's browser upon page load. Exploitation is gated on the Lazy Load Media option being enabled in plugin settings, limiting but not eliminating real-world exposure across the large SiteGround-hosted WordPress ecosystem. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Two specific conditions must both be true simultaneously: (1) The attacker holds at minimum a contributor-level WordPress account on the target site - lower roles (subscriber, unauthenticated users) cannot inject content into posts processed by this code path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD-assigned CVSS 3.1 score of 6.4 (Medium) reflects network reachability (AV:N), low complexity (AC:L), low-privilege attacker (PR:L), and scope change (S:C), with partial confidentiality and integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade the Speed Optimizer plugin to version 7.8.1 or later; the fix is confirmed by the WordPress plugin repository changeset at https://plugins.trac.wordpress.org/changeset?reponame=&new=3642965%40sg-cachepress%2Ftags%2F7.8.1&old=3581843%40sg-cachepress%2Ftags%2F7.8.0, which documents the transition from 7.8.0 to 7.8.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
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