CVE-2021-33040

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

0.94% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 58.4% 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

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

2022-01-17 16:14Z4 YR AGO

Last updated

2024-08-03 23:42Z2 YR AGO

Reserved

2021-05-17

Assigning CNA

mitre

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

740b5d147b811b46e918a6c0aed532f11140eeb035177a98713a6853ab60059c

• github.comhttps://github.com/futurepress/epub.js/blob/5c7f21d648d9d20d44c6c365d164b16871847023/src/managers/views/iframe.js#L373x_refsource_MISC
• github.comhttps://github.com/futurepress/epub.js/compare/v0.3.88...v0.3.89x_refsource_MISC
• github.comhttps://github.com/futurepress/epub.js/commit/ab4dd46408cce0324e1c67de4a3ba96b59e5012ex_refsource_MISC