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CVE-2025-64500 — Vulnerability in symfony/symfony — CVE Details

HIGH

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

Published November 12, 2025Updated September 10, 2026Source: osv

What Should I Do?

Address in Next Maintenance Window

Low exploitation probability (0.04%). Schedule for your next planned update.

Summary

### Description 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. ### Resolution The `Request` class now ensures that URL paths always start with a `/`. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/9962b91b12bb791322fa73836b350836b6db7cac) for branch 5.4. ### Credits We would like to thank Andrew Atkinson for discovering the issue, Chris Smith for reporting it and Nicolas Grekas for providing the fix.

Advisory Timeline

  • First published November 12, 2025 (334 days ago).
  • Last revised September 10, 2026 — 301 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer
Update symfony/symfony to 7.3.7 or later
composer require "symfony/symfony:^7.3.7"
Composer
Update symfony/http-foundation to 5.4.50 or later
composer require "symfony/http-foundation:^5.4.50"
Composer
Update symfony/http-foundation to 7.3.7 or later
composer require "symfony/http-foundation:^7.3.7"
Composer
Update symfony/symfony to 5.4.50 or later
composer require "symfony/symfony:^5.4.50"
Composer
Update symfony/http-foundation to 6.4.29 or later
composer require "symfony/http-foundation:^6.4.29"
Composer
Update symfony/symfony to 6.4.29 or later
composer require "symfony/symfony:^6.4.29"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (6)

Affects 1 ecosystem: packagist (2).

PackageEcosystemAffectedFixed In
symfony/symfony
packagist
v7.0.0, v7.0.1, v7.0.10, v7.0.2 (+44 more)7.3.7
symfony/http-foundation
packagist
2.0.4, 2.0.5, 2.0.6, 2.0.7 (+571 more)5.4.50
symfony/http-foundation
packagist
v7.0.0, v7.0.10, v7.0.3, v7.0.4 (+36 more)7.3.7
symfony/symfony
packagist
2.0.4, 2.0.5, 2.0.6, 2.0.7 (+625 more)5.4.50
symfony/http-foundation
packagist
v6.0.0, v6.0.1, v6.0.10, v6.0.11 (+83 more)6.4.29
symfony/symfony
packagist
v6.0.0, v6.0.1, v6.0.10, v6.0.11 (+105 more)6.4.29

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.3 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

Frequently Asked Questions

What is CVE-2025-64500?
Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.3/10).
How do I check if my project is affected by CVE-2025-64500?
CVE-2025-64500 affects symfony/symfony and symfony/http-foundation. It has a 0.04% probability of exploitation within 30 days (EPSS score). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-64500 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.3

High exploitability or significant impact. Prioritize remediation within days.

EPSS Score (30-day exploit probability)
0.04%
Higher than 12% of vulnerabilities

This is a below-median EPSS score — only 12.3% of tracked vulnerabilities score at or below it, so most tracked vulnerabilities are considered more likely to be exploited than this one.

Also Known As

GHSA-3rg7-wf37-54rm

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