GHSA-5QQR-Q6RW-943W

Vulnerability from github – Published: 2026-06-18 15:32 – Updated: 2026-06-18 15:32
VLAI
Details

The Slideshow Gallery LITE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'alwaysauto' shortcode attribute in all versions up to, and including, 1.8.5. This is due to insufficient input sanitization and output escaping on user-supplied attributes. 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.

Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-2021"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-18T13:25:33Z",
    "severity": "MODERATE"
  },
  "details": "The Slideshow Gallery LITE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027alwaysauto\u0027 shortcode attribute in all versions up to, and including, 1.8.5. This is due to insufficient input sanitization and output escaping on user-supplied attributes. 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.",
  "id": "GHSA-5qqr-q6rw-943w",
  "modified": "2026-06-18T15:32:01Z",
  "published": "2026-06-18T15:32:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2021"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/slideshow-gallery/tags/1.8.5/slideshow-gallery.php#L558"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/slideshow-gallery/tags/1.8.5/views/default/gallery.php#L192"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/slideshow-gallery/trunk/slideshow-gallery.php#L558"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/slideshow-gallery/trunk/views/default/gallery.php#L192"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3567787%40slideshow-gallery\u0026new=3567787%40slideshow-gallery\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/55d842fc-a750-4b59-a1d6-b3bd427dfe79?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.