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Fencer Intel
high 7.2

CVE-2018-14774 json

Symfony Host Header Injection

published 8y ago modified 4mo ago also GHSA-66p6-7p29-55p9 , EUVD-2022-2728

cvss
7.2
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

An issue was discovered in HttpKernel in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. When using HttpCache, the values of the X-Forwarded-Host headers are implicitly set as trusted while this should be forbidden, leading to potential host header injection.

Patch / fix

  • packagist symfony/symfony 2.7.49, 2.8.44, 3.3.18, 3.4.14, 4.0.14, 4.1.3
  • symfony Debian 14, Debian 13, Debian 12 3.4.14+dfsg-1

debian advisories DEBIAN-CVE-2018-14774

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Exploit prediction

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.2 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub 3.0 7.2 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist symfony/symfony
>=2.7.0, <2.7.49
>=2.8.0, <2.8.44
>=3.3.0, <3.3.18
>=3.4.0, <3.4.14
>=4.0.0, <4.0.14
>=4.1.0, <4.1.3
2.7.49
2.8.44
3.3.18
3.4.14
4.0.14
4.1.3

Classification

Weakness
  • CWE-20 Improper Input Validation

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.