CVE-2020-5274

Name: CVE-2020-5274
Creator: NVD / NIST
Published: 2020-03-30T20:15:19.633+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2020-5274 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

1.20%

64.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Sensiolabs	Symfony	>= 4.4.0, < 4.4.4
Sensiolabs	Symfony	>= 5.0.0, < 5.0.4

References

https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45dbPatch, Third Party Advisory
https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5adPatch, Third Party Advisory
https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2Third Party Advisory
https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45dbPatch, Third Party Advisory
https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5adPatch, Third Party Advisory
https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2Third Party Advisory

Timeline

Published: Mar 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5274?

How severe is CVE-2020-5274?

CVE-2020-5274 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5274?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-5274?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST