CVE-2023-32686Network attack vector

Stored XSS via upload validation bypass

Published May 27, 2023 · Updated Jan 14, 2025

Stored XSS in Kiwi TCMS 12.2 and earlier allows remote attackers to execute JavaScript in another user's browser through uploaded files. Attachment validators inadequately scan embedded script content, allowing a combination of uploaded files to bypass the configured Content Security Policy. A victim must view the attacker-controlled upload; successful exploitation runs script in the victim's browser with access to application data.

CVSS severity8.1
High
EPSS probability0.43%
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 Kiwi TCMS 12.2 and earlier allows remote attackers to execute JavaScript in another user's browser through uploaded files. Attachment validators inadequately scan embedded script content, allowing a combination of uploaded files to bypass the configured Content Security Policy. A victim must view the attacker-controlled upload; successful exploitation runs script in the victim's browser with access to application data.

The record

CVE
CVE-2023-32686
Published
May 27, 2023
Updated
Jan 14, 2025
Vendor
Kiwi TCMS
Product
Kiwi TCMS
Classifications
CWE-434, CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2025Record 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=< 12.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kiwi TCMS · Kiwi TCMSversion=< 12.3

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
5.4NIST NVDCVSS:3.1/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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