6.4

CVE-2026-39638: themeum qubely Cross-site Scripting

CVSS: 6.4v3.1MediumDeferred
Published 08-04-2026Last modified 29-04-2026
Open JSON

Vulnerability summary

CVE-2026-39638 is a medium (CVSS 6.4) Cross-site Scripting vulnerability in themeum qubely. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.2% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.4/10
010
Medium · v3.1 (wordfence)
EPSS score
0.24%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-04-2026
    PublishedVulnerability first disclosed.
  2. 29-04-2026
    Last modifiedVulnerability information updated.

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Themeum Qubely qubely allows Stored XSS.This issue affects Qubely: from n/a through <= 1.8.14.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

+0.07 pp

From 0.17% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.24%

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

Themeum1 product
Wordpress1 product
  • qubely≤ 1.8.14

2 vendors · 2 products

References

2 links