9.8

CVE-2026-84750

CVSS: 9.8v3.1CriticalDeferred
Published 2026-09-19Last modified 2026-09-19
Open JSON

Vulnerability summary

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (wordfence)
EPSS score
0.45%
0%100%
Low · Change unavailable
KEVNot listed0 of 3 catalogs
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 2026-09-19
    PublishedVulnerability first disclosed.
  2. 2026-09-19
    Last modifiedVulnerability information updated.

Description

The Ultra Addons for Contact Form 7 WordPress plugin before 3.5.51 does not validate the type or extension of files uploaded through one of its form fields, and stores them at a predictable public path with the attacker-chosen extension intact, allowing unauthenticated users to upload arbitrary files. The PHP handler shipped by default with the Debian and Ubuntu Apache packages maps .phar to PHP alongside .php and .phtml, so on that stack the uploaded file is executed and the issue leads to Remote Code Execution and full site takeover. Where the host routes only .php to the PHP handler, the same file is instead served from the site's own origin with its script intact, leading to Stored Cross-Site Scripting.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

2026-09-192026-10-14
EPSS score
0.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Unknown1 product
  • ultra addons for contact form 7≥ 3.2.4, < 3.5.51
Wordpress1 product
  • ultimate-addons-for-contact-form-7≥ 3.2.4, ≤ 3.5.50 (fixed in 3.5.51)

2 vendors · 2 products

References

2 links