CVE-2023-48701Network attack vector

Stored XSS via missing file-extension allowlist

Published Nov 21, 2023 · Updated Aug 2, 2024

Stored XSS in Statamic CMS asset uploads allows remote attackers to execute scripts when a crafted HTML file is later viewed. Upload validation accepts HTML disguised as an image because it relies on MIME validation without restricting the file extension. Exposure requires an asset field in a front-end Forms form or authenticated control-panel access, followed by user interaction with the stored file.

CVSS severity7.5
High
EPSS probability0.70%
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 Statamic CMS asset uploads allows remote attackers to execute scripts when a crafted HTML file is later viewed. Upload validation accepts HTML disguised as an image because it relies on MIME validation without restricting the file extension. Exposure requires an asset field in a front-end Forms form or authenticated control-panel access, followed by user interaction with the stored file.

The record

CVE
CVE-2023-48701
Published
Nov 21, 2023
Updated
Aug 2, 2024
Vendor
Statamic, LLC
Product
Statamic CMS
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 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=< 3.4.15
  2. Affected versionversion=>= 4.0.0, < 4.36.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Statamic, LLC · Statamic CMSversion=< 3.4.15; version=>= 4.0.0, < 4.36.0

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:H
6.1NIST NVDCVSS: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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1203Exploitation for Client Execution

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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