CVE Tools
Sign in

CVE-2020-5255

Prevent cache poisoning via a Response Content-Type header

Published: Mar 30, 2020Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-435
NVD MITRE
2.6CVSSLOW
EPSS Score
1.3%
Top 33.4%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available

Description

In Symfony before versions 4.4.7 and 5.0.7, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response's content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:RS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-435CWE-20

Affected Products

symfonysensiolabs
LibraryLibrary
OSS Libraries / generic-library
symfony/http-foundationPackagistOSS Libraries
symfony/symfonyPackagistOSS Libraries
symfonysymfony
Library
OSS Libraries / web-framework
sensiolabsoss-projectOSS Libraries
packagistpackage-ecosystemOSS Libraries
symfonyoss-projectOSS Librariesaka symfony framework, twig (related)

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6
github.com
https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859
github.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/
lists.fedoraproject.org
and 6 more references View all →

Timeline

Published
Mar 30, 2020
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2020-5255 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows