4.8

CVE-2026-56393: craftcms cms Cross-site Scripting

CVSS: 4.8v3.1MediumDeferred
Published 21-06-2026Last modified 22-06-2026
Open JSON

Vulnerability summary

CVE-2026-56393 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in craftcms cms. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.6% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.32%
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. 21-06-2026
    PublishedVulnerability first disclosed.
  2. 22-06-2026
    Last modifiedVulnerability information updated.

Description

Craft CMS 4.x (>= 4.0.0-RC1, < 4.17.0-beta.1) and 5.x (>= 5.0.0-RC1, < 5.9.0-beta.1) contain multiple stored cross-site scripting vulnerabilities where settings names and field option labels are rendered without sanitization (e.g., via the checkbox.twig template, which used {{ label|raw }}). An authenticated administrator (with allowAdminChanges enabled) can inject malicious payloads into section names, volume names, user group names, global set names, generated field names, checkbox/radio option labels, and custom source labels, causing arbitrary JavaScript to execute in other users' control-panel sessions. Fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

0.00 pp

From 0.32% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.32%

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

Craftcms1 product
  • cms≥ 5.0.0-RC1, < 5.9.0-beta.1 | ≥ 4.0.0-RC1, < 4.17.0-beta.1

1 vendor · 1 product

References

4 links