What is CVE-2025-56264?

CVE-2025-56264 is a high-severity vulnerability in Zhyd Oneblog, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-09-16.

How severe is CVE-2025-56264?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2025-56264 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Zhyd Oneblog

CVE-2025-56264

The /api/comment endpoint in zhangyd-c OneBlog 2.3.9 contains a denial-of-service vulnerability.

Vulnerability class: DoS (Denial of Service)

Published 2025-09-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Zhyd Oneblog — versions 2.3.9

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

echo0d/vulnerability

References

github.com/echo0d/vulnerability/blob/main/zhangyd-c_OneBlog/DoS.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-56264?: CVE-2025-56264 is a high-severity vulnerability in Zhyd Oneblog, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-09-16.
How severe is CVE-2025-56264?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-56264 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.