Drupal cross-site scripting vulnerability
Drupal 8.4.x versions before 8.4.5 and Drupal 7.x versions before 7.57 has a Drupal.checkPlain() JavaScript function which is used to escape potentially dangerous text before outputting it to HTML (as JavaScript output does not typically go through Twig autoescaping). This function does not correctly handle all methods of injecting malicious HTML, leading to a cross-site scripting vulnerability under certain circumstances. The PHP functions which Drupal provides for HTML escaping are not affected.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | drupal/core | >= 8.4.0, < 8.4.5, >= 7.0, < 7.57 | 8.4.5, 7.57 |
| Composer package | drupal/drupal | >= 8.4.0, < 8.4.5, >= 7.0, < 7.57 | 8.4.5, 7.57 |
| Drupal (core) | drupal/core | >= 8.4.0, < 8.4.5, >= 7.0, < 7.57, >= 8.4.0, < 8.4.5, >= 7.0, < 7.57 | 8.4.5, 7.57 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-6927
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6927.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6927.yaml
- https://github.com/drupal/core
- https://lists.debian.org/debian-lts-announce/2018/02/msg00030.html
- https://www.debian.org/security/2018/dsa-4123
- https://www.drupal.org/sa-core-2018-001
- http://www.securityfocus.com/bid/103138
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Composer, Drupal
- Package
drupal/core, drupal/drupal- Disclosed
- 14.05.2022
- Updated
- 11.10.2026 11:18
Sources and licenses
OSV / GitHub Advisory Database - GHSA-585j-5449-mf5m - CC BY 4.0
Vulnerability history: drupal/core
All published vulnerabilities of this package (Drupal (core)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 165
- First → latest
- 02.2018 09.2026
- Without a fix
- 3
- Exploited in attacks
- 5
Severity breakdown
- Critical 17
- High 44
- Medium 72
- Low 6
- Unrated 26
Disclosures per year
- 2018: 4
- 2019: 14
- 2020: 12
- 2021: 11
- 2022: 61
- 2023: 6
- 2024: 36
- 2025: 8
- 2026: 13
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Drupal cross-site scripting vulnerability this entry
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