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Fencer Vulns
high 7.5

CVE-2017-16654 json

Symfony Directory Traversal

published 2018-08-06 8 y ago modified 2026-06-17 4 mo ago also GHSA-c49r-8gj6-768r , EUVD-2022-3499

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Patch / fix

  • packagist symfony/intl 2.7.38, 2.8.31, 3.2.14, 3.3.13
  • packagist symfony/symfony 2.7.38, 2.8.31, 3.2.14, 3.3.13
  • symfony Debian 14, Debian 13, Debian 12 3.4.0+dfsg-1

debian advisories DEBIAN-CVE-2017-16654

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-2017-16654 updated cvss 7.3

php-symfony: Directory Traversal in the Intl component

  • 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

2.68% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist symfony/intl
>=2.7.0, <2.7.38
>=2.8.0, <2.8.31
>=3.0.0, <3.2.14
>=3.3.0, <3.3.13
2.7.38
2.8.31
3.2.14
3.3.13
packagist symfony/symfony
>=2.7.0, <2.7.38
>=2.8.0, <2.8.31
>=3.0.0, <3.2.14
>=3.3.0, <3.3.13
2.7.38
2.8.31
3.2.14
3.3.13

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.