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Fencer Vulns
medium 5.9

CVE-2024-49753 json

Denied Host Validation Bypass in Zitadel Actions

published 2024-10-25 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-2965 , GHSA-6cf5-w9h3-4rqv , GO-2024-3216

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

Zitadel is open-source identity infrastructure software. Versions prior to 2.64.1, 2.63.6, 2.62.8, 2.61.4, 2.60.4, 2.59.5, and 2.58.7 have a flaw in the URL validation mechanism of Zitadel actions allows bypassing restrictions intended to block requests to localhost (127.0.0.1). The isHostBlocked check, designed to prevent such requests, can be circumvented by creating a DNS record that resolves to 127.0.0.1. This enables actions to send requests to localhost despite the intended security measures. This vulnerability potentially allows unauthorized access to unsecured internal endpoints, which may contain sensitive information or functionalities. Versions 2.64.1, 2.63.6, 2.62.8, 2.61.4, 2.60.4, 2.59.5, and 2.58.7 contain a patch. No known workarounds are available.

Patch / fix

  • go github.com/zitadel/zitadel 0.0.0-20241022141644-79fb4cc1cc6e, 1.80.0-v2.20.0.20241022141644-79fb4cc1cc6e, 2.58.7, 2.59.5, 2.60.4, 2.61.4, 2.62.8, 2.63.6, 2.64.1
  • zitadel zitadel 2.58.7, 2.59.5, 2.60.4, 2.61.4, 2.62.8, 2.63.6, 2.64.1
  • govulncheck-vulndb SLE Module for Package Hub 15 SP6, SLE Module for Package Hub 15 SP5, openSUSE Leap 15.6 +1 more 0.0.20241030T212825-150000.1.9.1

suse advisories SUSE-SU-2024:3911-1

  • govulncheck-vulndb Package Hub 12 0.0.20241104T154416-5.1
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20241030T212825-1.1

opensuse advisories openSUSE-SU-2024:0350-1openSUSE-SU-2024:14447-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/zitadel/zitadel/security/advisories/GHSA-6cf5-w9h3-4rqv referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
go github.com/zitadel/zitadel
>=2.64.0, <2.64.1
>=2.63.0, <2.63.6
>=2.62.0, <2.62.8
>=2.61.0, <2.61.4
>=2.60.0, <2.60.4
>=2.59.0, <2.59.5
>=1.80.1, <2.58.7
<0.0.0-20241022141644-79fb4cc1cc6e
>=0.0.0, <1.80.0-v2.20.0.20241022141644-79fb4cc1cc6e
all versions
2.64.1
2.63.6
2.62.8
2.61.4
2.60.4
2.59.5
2.58.7
0.0.0-20241022141644-79fb4cc1cc6e
1.80.0-v2.20.0.20241022141644-79fb4cc1cc6e

Affected products

  • zitadel zitadel

Classification

Weakness
  • CWE-20 Improper Input Validation

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.