CVE-2021-30890

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

1.46% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 71.5% of scored records. A rank, not a probability.

NVD base score

6.1 (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:C/C:L/I:L/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

2021-08-24 18:49Z5 YR AGO

Last updated

2024-08-03 22:48Z2 YR AGO

Reserved

2021-04-13

Assigning CNA

apple

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

c23f2198464aeec04939bf4e899e54d55931ae8ce0f4cb35ede849e89c13aa21

• support.apple.comhttps://support.apple.com/en-us/HT212869x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212867x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212874x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212876x_refsource_MISC
• www.openwall.com[oss-security] 20211220 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0007http://www.openwall.com/lists/oss-security/2021/12/20/6mailing-listx_refsource_MLIST
• www.debian.orgDSA-5030https://www.debian.org/security/2021/dsa-5030vendor-advisoryx_refsource_DEBIAN
• www.debian.orgDSA-5031https://www.debian.org/security/2021/dsa-5031vendor-advisoryx_refsource_DEBIAN
• lists.fedoraproject.orgFEDORA-2022-25a98f5d55https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-f7366e60cbhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/vendor-advisoryx_refsource_FEDORA