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TI-2020-04330 Aliases CVE-2020-5274GHSA-m884-279h-32v2

Exceptions displayed in non-debug configurations in Symfony

Priority LOW 27CWE-209Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-209.

Summary

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

Why it matters now

EPSS 0.01197 68th percentileScored 2026-11-07
Fix Fixed symfony (symfony): 4.4.5, 5.0.5symfony/error-handler (Packagist): 4.4.4, 5.0.4+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
symfonysymfony4.0.0 to before 4.4.5; 5.0.0 to before 5.0.54.4.5, 5.0.5Patch availableCNA
—symfony/error-handler (Packagist)4.4.0 to before 4.4.44.4.4Patch availableGHSA-m884-279h-32v2
—symfony/error-handler (Packagist)5.0.0 to before 5.0.45.0.4Patch availableGHSA-m884-279h-32v2
—symfony/symfony (Packagist)4.4.0 to before 4.4.44.4.4Patch availableGHSA-m884-279h-32v2
—symfony/symfony (Packagist)5.0.0 to before 5.0.45.0.4Patch availableGHSA-m884-279h-32v2
  • symfony Vendorsymfony Affected 4.0.0 to before 4.4.5; 5.0.0 to before 5.0.5 Fixed in 4.4.5, 5.0.5 Patch available CNA
  • symfony/error-handler (Packagist) Vendor— Affected 4.4.0 to before 4.4.4 Fixed in 4.4.4 Patch available GHSA-m884-279h-32v2
  • symfony/error-handler (Packagist) Vendor— Affected 5.0.0 to before 5.0.4 Fixed in 5.0.4 Patch available GHSA-m884-279h-32v2
  • symfony/symfony (Packagist) Vendor— Affected 4.4.0 to before 4.4.4 Fixed in 4.4.4 Patch available GHSA-m884-279h-32v2
  • symfony/symfony (Packagist) Vendor— Affected 5.0.0 to before 5.0.4 Fixed in 5.0.4 Patch available GHSA-m884-279h-32v2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*4.4.0 to before 4.4.4; 5.0.0 to before 5.0.4Vulnerablesensiolabs
  • cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* Versions 4.4.0 to before 4.4.4; 5.0.0 to before 5.0.4 Vulnerable ·sensiolabs

Remediation

  • Fix · CNA symfony (symfony) Fixed in 4.4.5, 5.0.5
  • Fix · GHSA-m884-279h-32v2 symfony/error-handler (Packagist) Fixed in 4.4.4 Advisory →
  • Fix · GHSA-m884-279h-32v2 symfony/error-handler (Packagist) Fixed in 5.0.4 Advisory →
  • Fix · GHSA-m884-279h-32v2 symfony/symfony (Packagist) Fixed in 4.4.4 Advisory →
  • Fix · GHSA-m884-279h-32v2 symfony/symfony (Packagist) Fixed in 5.0.4 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-5274
  2. 2026-10-03 Alias added: GHSA-m884-279h-32v2

References

Patch 2

Advisory 2

Other 3

  • TI-2024-33775 Ability to change environment from query in symfony/runtime CVSS 3.1HIGH 7.3
  • TI-2026-34283 Twig: The `spaceless` filter implicitly marks its output as safe CVSS 4.0MEDIUM 5.1
  • TI-2022-07667 Code injection in Twig CVSS 3.1CRITICAL 9.8
  • TI-2018-10028 Twig before 2.4.4 allows Server-Side Template Injection (SSTI) via the search search_key… CVSS 3.0CRITICAL 9.8
  • TI-2026-35851 Incorrect authorization in symfony CVSS 4.0HIGH 8.7
  • TI-2026-35264 Improper input validation in symfony CVSS 4.0HIGH 8.3
See all 94 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences