9.8

CVE-2026-15748: wordpress forminator

CVSS: 9.8v3.1CriticalDeferred
Published 18-08-2026Last modified 18-08-2026
Open JSON

Vulnerability summary

CVE-2026-15748 is a critical (CVSS 9.8) vulnerability in wordpress forminator. EPSS estimates a 6.14% chance of exploitation in the next 30 days, higher than 93.4% of scored vulnerabilities. Fixed in 1.56.2.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
6.14%
0%100%
Low · +1.52 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-08-2026
    PublishedVulnerability first disclosed.
  2. 18-08-2026
    Last modifiedVulnerability information updated.

Description

The Forminator Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.56.1 via the handle_file_upload function. This is due to insufficient file type validation in handle_file_upload, where the dangerous-extension blocklist performs exact-key matching that is bypassed by pipe-alternative MIME type keys, combined with a public submission handler that trusts attacker-controlled upload field configuration injected via a forged Select field value. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

6.14%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

+1.52 pp

From 4.61% on 21-09-2026

21-09-202621-10-2026
EPSS score
6.14%

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

Wordpress1 product
  • forminator≤ 1.56.1 (fixed in 1.56.2)
Wpmudev1 product

2 vendors · 2 products

References

8 links