CVE-2023-30847

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

0.90% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 59.3% of scored records. A rank, not a probability.

NVD base score

8.2 (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:L/I:N/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

2023-04-27 14:08Z3 YR AGO

Last updated

2025-01-30 19:51Z1 YR AGO

Reserved

2023-04-18

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.2)

CNA CVSS vector

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

Weaknesses

• CWE-824Access of Uninitialized PointerBase

Data version

5.1

Document digest

5d694f358741c8f73bfed7f83aa89c5c109715b436a63af79ee80e3b030dd8c6

• github.comhttps://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvxx_refsource_CONFIRM
• github.comhttps://github.com/h2o/h2o/pull/3229x_refsource_MISC
• github.comhttps://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33x_refsource_MISC