CVE-2025-8266

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• 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

0.98% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 59.9% of scored records. A rank, not a probability.

NVD base score

2.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. 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

2025-07-28 08:32Z1 YR AGO

Last updated

2025-07-28 16:59Z1 YR AGO

Reserved

2025-07-27

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-502Deserialization of Untrusted DataBase

Data version

5.1

Document digest

254fdd0bcff8598370df2bf37d5653d503f5343a72463b4011865b53e765c56f

• vuldb.comVDB-317857 | yanyutao0402 ChanCMS collect.js getArticle deserializationhttps://vuldb.com/?id.317857vdb-entrytechnical-description
• vuldb.comVDB-317857 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.317857signaturepermissions-required
• vuldb.comSubmit #622170 | yanyutao0402 https://gitee.com/yanyutao0402/ChanCMS <3.1.3 Remote Code Executionhttps://vuldb.com/?submit.622170third-party-advisory
• gitee.comhttps://gitee.com/yanyutao0402/ChanCMS/issues/ICLP61exploitissue-tracking
• gitee.comhttps://gitee.com/yanyutao0402/ChanCMS/releases/tag/V3.1.3patch