CVE-2021-43802

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

1.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 78.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-12-09 22:35Z4 YR AGO

Last updated

2024-08-04 04:03Z2 YR AGO

Reserved

2021-11-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 9.9)

CNA CVSS vector

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

Weaknesses

• CWE-790Improper Filtering of Special ElementsClass
• CWE-1287Improper Validation of Specified Type of InputBase
• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

391c054d12f3e8726f206858b424a384a740aecc25b761962430709bf7224c66

• github.comhttps://github.com/ether/etherpad-lite/security/advisories/GHSA-w3g3-qf3g-2mqcx_refsource_CONFIRM
• github.comhttps://github.com/ether/etherpad-lite/issues/5010x_refsource_MISC
• github.comhttps://github.com/ether/etherpad-lite/compare/b7065eb9a0ec7c3c265f8cfeb2534efe6f036456...77bcb507b30e762e9375b0511b3763e0162aae53x_refsource_MISC
• github.comhttps://github.com/ether/etherpad-lite/releases/tag/1.8.16x_refsource_MISC