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Vulnerabilities

Vulnerability · CVE-2026-4300

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.

Published Apr 8, 2026 · catalog updated Jul 24, 2026 · The Robo Gallery plugin

Check if you run it

No confirmed exploitation is on record for CVE-2026-4300. EPSS is 0.51%. Act only if a listed version of The Robo Gallery plugin is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The Robo Gallery plugin).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.51%
Remediation
Version ranges on file
Affected products
stated named in the record

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 method to embed raw JavaScript function references within JSON-encoded configuration objects. When a gallery's options are rendered on the frontend, wraps all string values in double quotes. The method then strips the and sequences, effectively converting a JSON string value into raw JavaScript code. The Loading Label field (stored as post_meta) is an type field that is sanitized with on save. While this strips HTML tags, it does not strip the markers since they contain no HTML. When a user inputs , the value passes through sanitization intact, is stored in post_meta, and is later retrieved and output within an inline tag via with the quote markers stripped — resulting in arbitrary JavaScript execution. The gallery post type uses , 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated named in the record<= 5.1.3

How to fix CVE-2026-4300

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-4300. EPSS is 0.51%. Act only if a listed version of The Robo Gallery plugin is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 5.1.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.51%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 8, 2026 · NIST NVD

    Detected

    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 method to embed raw JavaScript function references within JSON-encoded configuration objects. When a gallery's options are rendered on the frontend, wraps all string values in double quotes. Th

  2. Jul 24, 2026 · NIST NVD

    Updated

    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 method to embed raw JavaScript function references within JSON-encoded configuration objects. When a gallery's options are rendered on the frontend, wraps all string values in double quotes. Th

Sources

  • CVE.orgVulnerability recordCVE-2026-4300

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-4300

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-4300

    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 method to embed raw JavaScript function r

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.