CVE-2020-5255

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 68.4% of scored records. A rank, not a probability.

NVD base score

4.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-03-30 19:30Z6 YR AGO

Last updated

2024-08-04 08:22Z2 YR AGO

Reserved

2020-01-02

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Low (CVSS 2.6)

CNA CVSS vector

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

Weaknesses

• CWE-435Improper Interaction Between Multiple Correctly-Behaving EntitiesPillar
• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

e9bcf88ff234e03ded8b86030be9d058bfd29fe4ab72c601f0cb55f66ce40418

• github.comhttps://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859x_refsource_CONFIRM
• github.comhttps://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6x_refsource_MISC
• symfony.comhttps://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-headerx_refsource_MISC
• lists.fedoraproject.orgFEDORA-2020-fade6a8df7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/vendor-advisoryx_refsource_FEDORA