6.4

CVE-2026-18488: creativethemeshq blocksy companion Cross-site Scripting

CVSS: 6.4v3.1MediumDeferred
Published 01-09-2026Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2026-18488 is a medium (CVSS 6.4) Cross-site Scripting vulnerability in creativethemeshq blocksy companion. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.5% of scored vulnerabilities. Fixed in 2.1.52.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-09-2026
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

0.00 pp

From 0.33% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Creativethemeshq1 product
Wordpress1 product
  • blocksy-companion≤ 2.1.51 (fixed in 2.1.52)

2 vendors · 2 products

References

12 links
Show all 12 references