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Fencer Vulns
high 7.6

CVE-2023-39345 json

Unauthorized Access to Private Fields in User Registration API in strapi

published 2023-11-03 3 y ago modified 2026-06-17 4 mo ago also GHSA-gc7p-j5xm-xxh2 , EUVD-2023-2965

cvss
7.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

strapi is an open-source headless CMS. Versions prior to 4.13.1 did not properly restrict write access to fielded marked as private in the user registration endpoint. As such malicious users may be able to errantly modify their user records. This issue has been addressed in version 4.13.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Patch / fix

  • npm @strapi/plugin-users-permissions 4.13.1
  • npm @strapi/strapi 4.13.1
  • strapi strapi 4.13.1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/strapi/strapi/security/advisories/GHSA-gc7p-j5xm-xxh2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.6 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
GitHub 3.1 7.6 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Affected packages

ecosystem package affected fixed in
npm @strapi/plugin-users-permissions
>=4.0.0, <4.13.1
4.13.1
npm @strapi/strapi
>=4.0.0, <4.13.1
4.13.1

Affected products

  • strapi strapi

Classification

Weakness

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.