CVE-2021-34551

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

2.80% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 85.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-06-16 17:23Z5 YR AGO

Last updated

2024-08-04 00:12Z2 YR AGO

Reserved

2021-06-10

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-434Unrestricted Upload of File with Dangerous TypeBase

Data version

5.1

Document digest

9e7684a468a42421ea1e9aecf337c27120f41bff4b8b8fd5330668d43ddc36c3

• github.comhttps://github.com/PHPMailer/PHPMailer/blob/master/SECURITY.mdx_refsource_CONFIRM
• lists.fedoraproject.orgFEDORA-2021-bfc34b3d5chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJYSOFCUBS67J3TKR74SD3C454N7VTYM/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-ef548cb234https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YRMWGA4VTMXFB22KICMB7YMFZNFV3EJ/vendor-advisoryx_refsource_FEDORA