CVE-2026-0609
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Logo Slider – Logo Carousel, Logo Showcase & Client Logo Slider Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the image alt text in all versions up to, and including, 4.9.0 due to insufficient input sanitization and output escaping in the 'logo-slider' shortcode. This makes it possible for authenticated attackers, with author level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Logo Slider WordPress plugin fails to properly sanitize and escape image alt text within the 'logo-slider' shortcode, allowing authenticated attackers with author-level or higher permissions to inject malicious JavaScript that persists in the database and executes when users view affected pages.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Logo Slider plugin is installedIn WordPress admin, go to Plugins > Installed Plugins and look for 'Logo Slider' or 'logo-slider'. Note the installed version number displayed.Affected if Plugin is installed and version is before 4.9.1
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Check for logo-slider shortcode usageSearch your WordPress database or use a plugin to find all posts/pages containing the shortcode [logo-slider] or [logo-slider-wp]. Inspect any pages using this shortcode for embedded logo entries.Affected if The shortcode is in use on your site
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Inspect alt text of logo entriesAccess the Logo Slider admin panel (usually under a 'Logos' or 'Logo Slider' menu item) and examine each logo entry's alt text field for any suspicious JavaScript code patterns such as <script>, javascript:, onload=, onerror=, or other HTML/script content.Affected if Any logo entry contains unsanitized JavaScript in the alt text field that was added by an author-level or higher user
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Examine database for malicious alt textQuery the wp_postmeta table (or equivalent) for meta_key values related to logo slider (e.g., _ls_image_alt or similar) and inspect the meta_value field for script tags or javascript: URIs.Affected if Database contains logo alt text with embedded script tags or event handlers
You are affected if the Logo Slider plugin version is before 4.9.1 AND the logo-slider shortcode is in use with potentially malicious alt text stored in your database.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate the plugin to version 4.9.1 or later which includes proper input sanitization and output escaping for the alt text field.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-0609 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-0609 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data