CVE-2021-38497

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

0.55% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 43.6% 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:N/I:H/A:N

NVD analysis status

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

Red Hat severity

Moderate. 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

2021-11-03 00:03Z4 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-346Origin Validation ErrorClass
• CWE-1021Improper Restriction of Rendered UI Layers or FramesBase

Data version

5.1

Document digest

5dbd9d18c95332e385c592e9e00e8718a06b98e99a919c33eee3ecab4cd1c622

• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-47/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-45/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-43/x_refsource_MISC
• bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1726621x_refsource_MISC