6.4

CVE-2023-6988: extendthemes colibri page builder Cross-site Scripting

CVSS: 6.4v3.1MediumModified
Published 11-01-2024Last modified 08-04-2026
Open JSON

Vulnerability summary

CVE-2023-6988 is a medium (CVSS 6.4) Cross-site Scripting vulnerability in extendthemes colibri page builder. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.4% of scored vulnerabilities. Fixed in 1.0.240.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.37%
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. 11-01-2024
    PublishedVulnerability first disclosed.
  2. 08-04-2026
    Last modifiedVulnerability information updated.

Description

The Colibri Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's extend_builder_render_js shortcode in all versions up to, and including, 1.0.239 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions 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

0.37%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

0.00 pp

From 0.37% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.37%

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

Extendthemes1 product
Wordpress1 product
  • colibri-page-builder≤ 1.0.239 (fixed in 1.0.240)

2 vendors · 2 products

References

4 links