CVE-2023-39953

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 45.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/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

2023-08-10 13:55Z3 YR AGO

Last updated

2024-10-03 15:11Z2 YR AGO

Reserved

2023-08-07

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

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

Weaknesses

• CWE-303Incorrect Implementation of Authentication AlgorithmBase

Data version

5.1

Document digest

fd5323fdf1cf23ef09b6bd54aa992413d30714fbba57330f8cd4177809b084bd

• github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-v363-q36jx_refsource_CONFIRM
• github.comhttps://github.com/nextcloud/user_oidc/pull/642x_refsource_MISC
• hackerone.comhttps://hackerone.com/reports/2021684x_refsource_MISC