CVE-2025-23922Public exploitNetwork attack vector

Web-shell upload via nonce-free ZIP handler

Published Jan 16, 2025 · Updated Apr 28, 2026

Cross-site request forgery in Harsh iSpring Embedder 1.0 and earlier allows remote attackers to upload arbitrary files via forged requests. The administrative upload handler accepts ZIP archives without valid nonce verification and extracts their contents into a web-accessible uploads directory. Exploitation requires an authenticated administrator to submit the forged request, after which an uploaded PHP web shell enables server-side code execution.

CVSS severity8.8
High
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Harsh iSpring Embedder 1.0 and earlier allows remote attackers to upload arbitrary files via forged requests. The administrative upload handler accepts ZIP archives without valid nonce verification and extracts their contents into a web-accessible uploads directory. Exploitation requires an authenticated administrator to submit the forged request, after which an uploaded PHP web shell enables server-side code execution.

The record

CVE
CVE-2025-23922
Published
Jan 16, 2025
Updated
Apr 28, 2026
Vendor
Harsh
Product
iSpring Embedder
Classifications
CWE-352, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=0 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Harsh · iSpring Embedderversion=0 <=1.0

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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-352Cross-Site Request Forgery (CSRF)
T1190Exploit Public-Facing Application

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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