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Fencer Intel
medium 6.1

CVE-2020-13666 json

Drupal Core Cross-site scripting vulnerability

published 6y ago modified last mo. also BIT-drupal-2020-13666 , DRUPAL-CORE-2020-007 , EUVD-2022-3195 , GHSA-8jj2-x2gc-ggm7

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

Cross-site scripting vulnerability in Drupal Core. Drupal AJAX API does not disable JSONP by default, allowing for an XSS attack. This issue affects: Drupal Drupal Core 7.x versions prior to 7.73; 8.8.x versions prior to 8.8.10; 8.9.x versions prior to 8.9.6; 9.0.x versions prior to 9.0.6.

Patch / fix

  • packagist drupal/core 7.73, 8.8.10, 8.9.6, 9.0.6
  • packagist drupal/drupal 7.73, 8.8.10, 8.9.6, 9.0.6
  • bitnami drupal 7.73.0, 8.8.10, 8.9.6, 9.0.6
  • Drupal Drupal Core 7.73, 8.8.10, 8.9.6, 9.0.6
  • drupal7 Alpine 3.20, Alpine 3.19, Alpine 3.18 +7 more 7.73-r0

alpine advisories ALPINE-CVE-2020-13666

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2020-13666 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-13666 updated cvss 4.6

drupal: AJAX API does not disable JSONP by default leads to XSS

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.93% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
OSV 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist drupal/core
>=8.8.0, <8.8.10
>=8.9.0, <8.9.6
>=9.0.0, <9.0.6
>=7.0.0, <7.73
>=8.0.0, <8.8.10
8.8.10
8.9.6
9.0.6
7.73
packagist drupal/drupal
>=7.0.0, <7.73
>=8.8.0, <8.8.10
>=8.9.0, <8.9.6
>=9.0.0, <9.0.6
7.73
8.8.10
8.9.6
9.0.6
bitnami drupal
>=7.0.0, <7.73.0
>=8.8.0, <8.8.10
>=8.9.0, <8.9.6
>=9.0.0, <9.0.6
7.73.0
8.8.10
8.9.6
9.0.6

Affected products

  • Drupal Drupal Core

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.