Vulnerability Report

CVE-2020-5274

Title: Improper escaping and display of stacktrace in Symfony ErrorHandler

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2020-5274.

CWE Category CWE-209
Published Date Mar 30, 2020
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 4.6 CVSS v3.1
Exploit Probability (EPSS)
1.20%

Vulnerability Summary

CVE-2020-5274: In Symfony before versions 5.0.5 and 4.4.5, some properties of the Exception were not properly escaped when the `ErrorHandler` rendered it stacktrace. In addition, the stacktrace were displayed even in a non-debug configuration. The ErrorHandler now escape alls properties of the exception, and the stacktrace is only display in debug configuration. This issue is patched in symfony/http-foundation versions 4.4.5 and 5.0.5

Impacted Vendors

S
sensiolabs 1
A
auth0 1

Reference Links

https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2 https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.4
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:S/C:P/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-5274 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Affected Stack

No specific products linked.