CVE-2022-25277Network attack vector

Authenticated PHP execution via dotfile sanitization bypass

Published Apr 26, 2023 · Updated Feb 3, 2025

Unrestricted file upload in Drupal core before 9.3.19 and 9.4.0 through 9.4.2 allows remote authenticated users to execute PHP on Apache. SecurityFileUploadEventSubscriber strips the leading dot before classifying the final extension, so an allowed .htaccess name evades insecure-extension munging. Reachability requires Apache and either permission to allow htaccess uploads or a contributed-module or custom-code override.

CVSS severity7.2
High
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Drupal core before 9.3.19 and 9.4.0 through 9.4.2 allows remote authenticated users to execute PHP on Apache. SecurityFileUploadEventSubscriber strips the leading dot before classifying the final extension, so an allowed .htaccess name evades insecure-extension munging. Reachability requires Apache and either permission to allow htaccess uploads or a contributed-module or custom-code override.

The record

CVE
CVE-2022-25277
Published
Apr 26, 2023
Updated
Feb 3, 2025
Vendor
OAuth.js
Product
Drupal core
Classifications
CWE-434, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.3 <9.3.19
  2. Affected versionversion=9.4 <9.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OAuth.js · Drupal coreversion=9.3 <9.3.19; version=9.4 <9.4.3

Published CVSS scores

7.2GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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