GHSA-3rg7-wf37-54rm CVE-2025-64500
Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass
- Severity
- 7.3 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 1.41%
- Chance of exploitation in the next 30 days. Higher than 72.63% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-647 Use of Non-Canonical URL Paths for Authorization Decisions
- Fix
- Available
- 2 packages have a fixed version
Description
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 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.
Affected versions
Packagist
| Package | Vulnerable | Fixed in |
|---|---|---|
| symfony/http-foundation | < 5.4.50 |
5.4.50 |
| symfony/http-foundation | >= 6.0.0, < 6.4.29 |
6.4.29 |
| symfony/http-foundation | >= 7.0.0, < 7.3.7 |
7.3.7 |
| symfony/symfony | >= 2.0.0, < 5.4.50 |
5.4.50 |
| symfony/symfony | >= 6.0.0, < 6.4.29 |
6.4.29 |
| symfony/symfony | >= 7.0.0, < 7.3.7 |
7.3.7 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
symfony/http-foundation Packagist → 5.4.50
- composer
composer require symfony/http-foundation:^5.4.50
symfony/symfony Packagist → 5.4.50
- composer
composer require symfony/symfony:^5.4.50
Severity breakdown
CVSS 3.1 7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Weakness
CWE-647: Use of Non-Canonical URL Paths for Authorization Decisions
The product defines policy namespaces and makes authorization decisions based on the assumption that a URL is canonical. This can allow a non-canonical URL to bypass the authorization.
How to prevent it
- Architecture and Design: Make access control policy based on path information in canonical form. Use very restrictive regular expressions to validate that the path is in the expected form.
- Architecture and Design: Reject all alternate path encodings that are not in the expected canonical form.
References
Advisories
Packages
Other links
- github.com/symfony/symfony/security/advisories/GHSA-3rg7-wf37-54rm
- github.com/symfony/symfony/commit/9962b91b12bb791322fa73836b350836b6db7cac
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation…
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-202…
- symfony.com/blog/cve-2025-64500-incorrect-parsing-of-path-info-can-lead-to-limit…
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-2v3c-qxhr-7vpv Symfony: Unbounded Recursion in the YAML Inline Lexer Lets a Single Document Crash the Process | High | Also affects symfony/symfony |
| GHSA-r925-mgvr-h9cc Symfony: ReDoS in HeaderUtils::split() Reachable Through the Cache-Control Request Header | High | Also affects symfony/http-foundation |
| GHSA-h5x3-xfc9-m39h Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization | Medium | Also affects symfony/symfony |
| GHSA-v3wm-qf9p-c549 Symfony: HtmlSanitizer URL Parser Deny Gates Underinclusive: Percent-Encoded BiDi Marks and Unicode Whitespace Bypass Visual-Spoofing Defense | Medium | Also affects symfony/symfony |
| GHSA-rrj9-5q2j-4gvr Symfony: Mailomat Mailer Webhook Parser Reads the HMAC Algorithm from the Request: Signature Algorithm Downgrade | Medium | Also affects symfony/symfony |
| GHSA-38cx-cq6f-5755 Symfony: IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-compatible): SSRF Bypass in NoPrivateNetworkHttpClient | High | Also affects symfony/http-foundation |
| GHSA-6h46-9jf5-q59x Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access to access_control-Protected GET Routes | High | Also affects symfony/symfony |
| GHSA-x5qj-865h-mgvm Symfony: HtmlSanitizer UrlAttributeSanitizer Misses URL Attributes | Medium | Also affects symfony/symfony |
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