CVE-2026-90527Network attack vector

Unauthenticated script execution via unsanitized message content

Published Sep 13, 2026 · Updated Sep 13, 2026

Cross-site scripting in shiyi-blog 1.2.0 through 1.2.1 allows remote attackers to execute script in an administrator's browser. The Add Message path places attacker-controlled body.content into the blog-admin message view without neutralizing it for HTML rendering. Exploitation requires an administrator to view the submitted message, after which the script runs with that user's browser privileges.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in shiyi-blog 1.2.0 through 1.2.1 allows remote attackers to execute script in an administrator's browser. The Add Message path places attacker-controlled body.content into the blog-admin message view without neutralizing it for HTML rendering. Exploitation requires an administrator to view the submitted message, after which the script runs with that user's browser privileges.

The record

CVE
CVE-2026-90527
Published
Sep 13, 2026
Updated
Sep 13, 2026
Vendor
quequnlong
Product
shiyi-blog
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2.0
  2. Affected versionversion=1.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

quequnlong · shiyi-blogversion=1.2.0; version=1.2.1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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