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CVE-2020-5274

Exceptions displayed in non-debug configurations in Symfony

Medium4.6EPSS 1.2%
Published
Updated
Reserved
Assigned by
GitHub_M

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

Scores

CVSS scores of CVE-2020-5274, by who scored it
Scored byCVSSScoreVector
GitHub_MCNA (assigner)3.1Medium4.6CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
NVDNVD · Modified3.1Medium5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
EPSS (exploitation in 30 days)
1.2% · top 32% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.6.

Weakness

Affected products

  • symfony · symfony

    • affected >= 4.0.0, < 4.4.5
    • affected >= 5.0.0, < 5.0.5

Affected packages

From reviewed advisories of the GitHub Advisory Database.

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .