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CVE-2026-18488
Blocksy Companion <= 2.1.51 - Authenticated (Author+) Stored Cross-Site Scripting via 'tagName' Block Attribute (blocksy/dynamic-data)
Medium6.4EPSS 0.42%
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
Description
The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'tagName' Block Attribute (blocksy/dynamic-data) in all versions up to, and including, 2.1.51 due to insufficient input sanitization and output escaping. 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.42% · top 64% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.
Weakness
Affected products
creativethemeshq · Blocksy Companion
- affected ≤ 2.1.51
References (11)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e0d0adcc-6741-4cab-aaba-df356691a1ee?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.51/framework/features/blocks/dynamic-data/views/wp-field.php#L487 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.51/framework/features/blocks/dynamic-data/views/wp-field.php#L448 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.51/framework/features/blocks/dynamic-data/block.php#L183 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.51/static/js/editor/blocks/dynamic-data/block.json#L7 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/framework/features/blocks/dynamic-data/views/wp-field.php#L487 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/framework/features/blocks/dynamic-data/views/wp-field.php#L448 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/framework/features/blocks/dynamic-data/block.php#L183 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/static/js/editor/blocks/dynamic-data/block.json#L7 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3636709/blocksy-companion/trunk/framework/features/blocks/dynamic-data/views/wp-field.php (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fblocksy-companion/tags/2.1.51&new_path=%2Fblocksy-companion/tags/2.1.52 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-18488)Record last updated .