CVE-2024-34255Public exploitNetwork attack vector

Stored script execution via unsanitized contact messages

Published May 8, 2024 · Updated Aug 2, 2024

Stored cross-site scripting in JiZhiCMS 2.5.1 allows remote attackers to execute script in an administrator's browser via a contact message. The public contact form stores an unneutralized image error-handler payload, and the admin message reply view renders it as active markup. Submission requires no authentication, but execution requires an administrator to open the stored message and select Reply, exposing that browser session to script-driven data access or actions.

CVSS severity6.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in JiZhiCMS 2.5.1 allows remote attackers to execute script in an administrator's browser via a contact message. The public contact form stores an unneutralized image error-handler payload, and the admin message reply view renders it as active markup. Submission requires no authentication, but execution requires an administrator to open the stored message and select Reply, exposing that browser session to script-driven data access or actions.

The record

CVE
CVE-2024-34255
Published
May 8, 2024
Updated
Aug 2, 2024
Vendor
Langfang Extreme Network Technology Co., Ltd
Product
JiZhiCMS
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=2.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Langfang Extreme Network Technology Co., Ltd · JiZhiCMSversion=2.5.1

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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