CVE-2023-42436Network attack vector

Browser script execution via stored presentation content

Published Dec 26, 2023 · Updated Aug 2, 2024

Stored XSS in GROWI before 3.4.0 allows remote authenticated users to execute arbitrary script in a visitor's web browser. Public advisories identify the presentation feature but do not disclose the affected field, rendering routine, or missing neutralization step. An attacker must first store crafted presentation content, and script execution requires another user to open the affected site, enabling page spoofing or unintended cookie access.

CVSS severity5.4
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in GROWI before 3.4.0 allows remote authenticated users to execute arbitrary script in a visitor's web browser. Public advisories identify the presentation feature but do not disclose the affected field, rendering routine, or missing neutralization step. An attacker must first store crafted presentation content, and script execution requires another user to open the affected site, enabling page spoofing or unintended cookie access.

The record

CVE
CVE-2023-42436
Published
Dec 26, 2023
Updated
Aug 2, 2024
Vendor
WESEEK, Inc.
Product
GROWI
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 26, 2023CVE 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=prior to v3.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WESEEK, Inc. · GROWIversion=prior to v3.4.0

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5JPCERT/CCAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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