Drupal core Un-restricted Upload of File
Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 3 / 5
- KEV catalog (CISA)18 Jan 2022
- Exploited in EUVD (ENISA)18 Jan 2022
- Used by ransomwareno
- EPSS above 10 %36.2%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply updates per vendor instructions.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.
Affected products
- 7 versions prior to 7.74
- 8.9 versions prior to 8.9.9
- 9.0 versions prior to 9.0.8
- 8.8 versions prior to 8.8.11
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
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EPSS peak: 36.2%
References
Other exploited vulnerabilities from the same vendor
- CVE-2026-9082Drupal Core SQL Injection Vulnerability9.0 · Actively exploited
- CVE-2018-7602Drupal Core Remote Code Execution Vulnerability9.2 · Background exploitation
- CVE-2019-6340Drupal Core Remote Code Execution Vulnerability8.4 · Background exploitation
- CVE-2018-7600Drupal Core Remote Code Execution Vulnerability9.9 · Background exploitation