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Fencer Vulns
high 7.3

CVE-2025-64500 json

Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass

published 2025-11-12 11 mo ago modified 2026-10-19 21 d ago also EUVD-2025-131928 , GHSA-3rg7-wf37-54rm

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known, plus a Nuclei check

Summary

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Symfony's HttpFoundation component defines an object-oriented layer for the HTTP specification. Starting in version 2.0.0 and prior to version 5.4.50, 6.4.29, and 7.3.7, the `Request` class improperly interprets some `PATH_INFO` in a way that leads to representing some URLs with a path that doesn't start with a `/`. This can allow bypassing some access control rules that are built with this `/`-prefix assumption. Starting in versions 5.4.50, 6.4.29, and 7.3.7, the `Request` class now ensures that URL paths always start with a `/`.

Patch / fix

  • packagist symfony/http-foundation 5.4.50, 6.4.29, 7.3.7
  • packagist symfony/symfony 5.4.50, 6.4.29, 7.3.7
  • sensiolabs symfony 5.4.50, 6.4.29, 7.3.7
  • sensiolabs twig 5.4.50, 6.4.29, 7.3.7
  • symfony Debian 12 5.4.23+dfsg-1+deb12u5
  • symfony Debian 13 6.4.21+dfsg-2+deb13u1
  • symfony Debian 14 7.4.0~rc1+dfsg-1

debian advisories DEBIAN-CVE-2025-64500

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-2025-64500 updated cvss 7.3

symfony/http-foundation: Symfony HttpFoundation: Limited authorization bypass

  • 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
partial
Assessed
11 mo ago

Exploit prediction

1.41% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Symfony HttpFoundation - Access Control Bypass via PATH_INFO nuclei detection template

CVSS scores

assigned by version score vector
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
GitHub 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
packagist symfony/http-foundation
<5.4.50
>=6.0.0, <6.4.29
>=7.0.0, <7.3.7
5.4.50
6.4.29
7.3.7
packagist symfony/symfony
>=2.0.0, <5.4.50
>=6.0.0, <6.4.29
>=7.0.0, <7.3.7
5.4.50
6.4.29
7.3.7

Affected products

  • symfony symfony

Classification

Weakness
  • CWE-647 Use of Non-Canonical URL Paths for Authorization Decisions

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.