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CVE-2018-14773· NVD / CVE Program· CNA mitre

An issue was discovered in Http Foundation 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

An issue was discovered in Http Foundation 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. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Aug 3, 2018
Updated
Jun 16, 2026
EPSS
58.1% · 99th percentile
CWE
—
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Report tools

JSON

Action score

43

Plan

Add it to your regular patch cycle.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
17 / 30 · 58.1%

Affected systems

VendorProduct
sensiolabssymfony
debiandebian linux
drupaldrupal

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux8.0
  • debian debian linux9.0
  • drupal drupal8.0.0 and later · before 8.5.6
  • sensiolabs symfony3.4.0 and later · up to 3.4.13 inclusive
  • sensiolabs symfonyafter 2.7.0 · up to 2.7.48 inclusive
  • sensiolabs symfony4.1.0 and later · up to 4.1.2 inclusive
  • sensiolabs symfony4.0.0 and later · up to 4.0.13 inclusive
  • sensiolabs symfony2.8.0 and later · up to 2.8.43 inclusive
  • sensiolabs symfony3.3.0 and later · up to 3.3.17 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12symfonybefore 3.4.14+dfsg-13.4.14+dfsg-1
Debian:8symfonybefore 2.3.21+dfsg-4+deb8u42.3.21+dfsg-4+deb8u4
Debian:9symfonybefore 2.8.7+dfsg-1.3+deb9u22.8.7+dfsg-1.3+deb9u2
Packagistsymfony/http-foundationfrom 2.7.0 · before 2.7.492.7.49
Packagistsymfony/http-foundationfrom 2.8.0 · before 2.8.442.8.44
Packagistsymfony/http-foundationfrom 3.0.0 · before 3.3.183.3.18
Packagistsymfony/http-foundationfrom 3.4.0 · before 3.4.143.4.14
Packagistsymfony/http-foundationfrom 4.0.0 · before 4.0.144.0.14
Packagistsymfony/http-foundationfrom 4.1.0 · before 4.1.34.1.3
Packagistsymfony/symfonyfrom 2.7.0 · before 2.7.492.7.49
Packagistsymfony/symfonyfrom 2.8.0 · before 2.8.442.8.44
Packagistsymfony/symfonyfrom 3.0.0 · before 3.3.183.3.18
Packagistsymfony/symfonyfrom 3.4.0 · before 3.4.143.4.14
Packagistsymfony/symfonyfrom 4.0.0 · before 4.0.144.0.14
Packagistsymfony/symfonyfrom 4.1.0 · before 4.1.34.1.3

Same product

sensiolabs: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-18889An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7.
    49Plan
  • CVE-2019-10910In Symfony before 2.7.51, 2.8.x before 2.8.50, 3.x before 3.4.26, 4.x before 4.1.12, and 4.2.x before 4.2.7, when service ids allow user inp
    41Plan
  • CVE-2019-11325An issue was discovered in Symfony before 4.2.12 and 4.3.x before 4.3.8.
    40Plan
  • CVE-2017-11365Certain Symfony products are affected by: Incorrect Access Control.
    40Plan
  • CVE-2019-10913In Symfony before 2.7.51, 2.8.x before 2.8.50, 3.x before 3.4.26, 4.x before 4.1.12, and 4.2.x before 4.2.7, HTTP Methods provided as verbs
    40Plan
  • CVE-2018-11407An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:symfony3.4.14+dfsg-1 · Debian:12Package registry (OSV)
Packagist:symfony/http-foundation2.7.49Package registry (OSV)
Packagist:symfony/http-foundation2.8.44Package registry (OSV)
Packagist:symfony/http-foundation3.3.18Package registry (OSV)
Packagist:symfony/http-foundation3.4.14Package registry (OSV)
Packagist:symfony/http-foundation4.0.14Package registry (OSV)
Packagist:symfony/http-foundation4.1.3Package registry (OSV)
Packagist:symfony/symfony2.7.49Package registry (OSV)
Packagist:symfony/symfony2.8.44Package registry (OSV)
Packagist:symfony/symfony3.3.18Package registry (OSV)
Packagist:symfony/symfony3.4.14Package registry (OSV)
Packagist:symfony/symfony4.0.14Package registry (OSV)
Packagist:symfony/symfony4.1.3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records