CVE-2021-38505

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

1.08% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 65.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

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

2021-12-08 21:21Z4 YR AGO

Last updated

2024-08-04 01:44Z2 YR AGO

Reserved

2021-08-10

Assigning CNA

mozilla

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-668Exposure of Resource to Wrong SphereClass
• CWE-838Inappropriate Encoding for Output ContextBase

Data version

5.1

Document digest

b5face90a5791a25be57b043f3be865e0ea324570e016cf9fcdef6e3cca09f30

• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-49/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-50/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-48/x_refsource_MISC
• bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1730194x_refsource_MISC