Robo Gallery <= 5.1.3 — Authenticated (Author+) Stored Cross-Site Scripting via 'Loading Label' Setting

Am I affected?

• Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Robo Gallery – Photo & Image Slider.
• No admin access? Run a passive check of your site. It reads public files only.

What to do

1. Update to version 5.1.4, or a newer patched version
2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
3. Watch Robo Gallery – Photo & Image Slider to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Athiwat Tiprasaharn (Jitlada).

The Robo Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Loading Label' setting in all versions up to, and including, 5.1.3. The plugin uses a custom `|***...***|` marker pattern in its `fixJsFunction()` method to embed raw JavaScript function references within JSON-encoded configuration objects. When a gallery's options are rendered on the frontend, `json_encode()` wraps all string values in double quotes. The `fixJsFunction()` method then strips the `"|***` and `***|"` sequences, effectively converting a JSON string value into raw JavaScript code. The Loading Label field (stored as `rbs_gallery_LoadingWord` post_meta) is an `rbstext` type field that is sanitized with `sanitize_text_field()` on save. While this strips HTML tags, it does not strip the `|***...***|` markers since they contain no HTML. When a user inputs `|***alert(document.domain)***|`, the value passes through sanitization intact, is stored in post_meta, and is later retrieved and output within an inline `<script>` tag via `renderMainBlock()` with the quote markers stripped — resulting in arbitrary JavaScript execution. The gallery post type uses `capability_type => 'post'`, allowing Author-level users to create galleries. 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 a page containing the gallery shortcode.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

• Advisorywordfence.com

Related CVEs

Timeline

1. Apr 7, 2026

   CVE published

   Severity medium, CVSS 6.4

2. Nov 13, 2026

   Record last updated