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CVE-2017-6927

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…

Severity
Medium 6.1
Published
1 Mar 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
7.57, 8.4.5
Exploit chance
1.6% in the next 30 daysHigher than 76% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Cross-site scripting (CWE-79)
Attack
Over the network · No login needed · Needs someone to click or open something
Attacker can
Read some data · Change some data
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Sources
NVD

Description

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.

From NVD.

Affected software

SoftwareAffected versions
DrupalServers and applications · cpe:a:drupal:drupal
  • From 7.0 before 7.57
  • From 8.4.0 before 8.4.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-6927
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-6927