CVE-2021-25833

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

43.53% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.6% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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

2021-03-01 15:09Z5 YR AGO

Last updated

2024-08-03 20:11Z2 YR AGO

Reserved

2021-01-22

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.1

Document digest

07bd719e763e0ef11ddc4fabc373f9f1cc71462db882d872b22c17d47efe37f0

• github.comhttps://github.com/ONLYOFFICE/DocumentServerx_refsource_MISC
• github.comhttps://github.com/ONLYOFFICE/serverx_refsource_MISC
• github.comhttps://github.com/ONLYOFFICE/server/blob/v5.6.0.21/DocService/sources/converterservice.js#L200x_refsource_MISC
• github.comhttps://github.com/ONLYOFFICE/server/blob/v5.6.0.21/FileConverter/sources/converter.js#L593x_refsource_MISC
• github.comhttps://github.com/ONLYOFFICE/server/blob/v5.6.0.21/FileConverter/sources/converter.js#L283x_refsource_MISC
• github.comhttps://github.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25833x_refsource_MISC