CVE-2021-41281

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

1.57% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 75.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-11-23 19:15Z4 YR AGO

Last updated

2024-08-04 03:08Z2 YR AGO

Reserved

2021-09-15

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.1

Document digest

e4641bb2ddd26391c4afd746c960635f857e9db44d9438680c25ee1c5bd1f1d4

• github.comhttps://github.com/matrix-org/synapse/security/advisories/GHSA-3hfw-x7gx-437cx_refsource_CONFIRM
• github.comhttps://github.com/matrix-org/synapse/commit/91f2bd090x_refsource_MISC
• github.comhttps://github.com/matrix-org/synapse/releases/tag/v1.47.1x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-2f9dcdbacehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N3WY56LCEZ4ZECLWV5KMAXF2PSMUB4F2/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-9758549fcehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EU7QRE55U4IUEDLKT5IYPWL3UXMELFAS/vendor-advisoryx_refsource_FEDORA