CVE-2023-43838Public exploitNetwork attack vector

Stored script execution via uploaded SVG avatar

Published Oct 4, 2023 · Updated Sep 20, 2024

Stored cross-site scripting in Personal Management System 1.4.64 allows remote authenticated users to execute JavaScript via a crafted SVG avatar. The UserAvatar update submits the avatar value without restricting SVG content, and the stored image renders embedded script when opened. An authenticated profile is needed to store the avatar, and another user must open it in a separate browser tab; the demonstrated impact is browser-side JavaScript execution rather than server-side code execution.

CVSS severity7.8
High
EPSS probability0.58%
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 Personal Management System 1.4.64 allows remote authenticated users to execute JavaScript via a crafted SVG avatar. The UserAvatar update submits the avatar value without restricting SVG content, and the stored image renders embedded script when opened. An authenticated profile is needed to store the avatar, and another user must open it in a separate browser tab; the demonstrated impact is browser-side JavaScript execution rather than server-side code execution.

The record

CVE
CVE-2023-43838
Published
Oct 4, 2023
Updated
Sep 20, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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