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Fencer Vulns
high 7.5

CVE-2023-5256 json

Drupal core - Critical - Cache poisoning - SA-CORE-2023-006

published 2023-09-20 3 y ago modified 2026-09-19 50 d ago also BIT-drupal-2023-5256 , DRUPAL-CORE-2023-006 , EUVD-2023-2586 , GHSA-rjqg-3h9m-fx5x

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

In certain scenarios, Drupal's JSON:API module will output error backtraces. With some configurations, this may cause sensitive information to be cached and made available to anonymous users, leading to privilege escalation.

This vulnerability only affects sites with the JSON:API module enabled, and can be mitigated by uninstalling JSON:API.

The core REST and contributed GraphQL modules are not affected.

Patch / fix

  • packagist drupal/core 9.5.11, 10.0.11, 10.1.4
  • bitnami drupal 9.5.11, 10.0.11, 10.1.4
  • drupal drupal 9.5.11, 10.0.11, 10.1.4

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-2023-5256 updated cvss 7.5

drupal: cache poisoning in JSON:API module

  • 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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist drupal/core
>=8.7.0, <9.5.11
>=10.0.0, <10.0.11
>=10.1.0, <10.1.4
9.5.11
10.0.11
10.1.4
bitnami drupal
>=8.7.0, <9.5.11
>=10.0.0, <10.0.11
>=10.1.0, <10.1.4
9.5.11
10.0.11
10.1.4

Affected products

  • Drupal Core
  • drupal drupal

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns 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.