CVE-2023-43875Public exploitNetwork attack vector

Browser script execution via unsanitized installer fields

Published Oct 19, 2023 · Updated Sep 12, 2024

Reflected XSS in the Subrion CMS 4.2.1 installer allows remote attackers to execute arbitrary web scripts through crafted setup fields. The installer reflects unsanitized dbhost, dbname, dbuser, adminusername, or adminemail input into the next-step page, where injected SVG onload code executes. The installation interface must remain reachable, and a user must submit the crafted field value and load the returned page for the script to run in that browser.

CVSS severity6.1
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in the Subrion CMS 4.2.1 installer allows remote attackers to execute arbitrary web scripts through crafted setup fields. The installer reflects unsanitized dbhost, dbname, dbuser, adminusername, or adminemail input into the next-step page, where injected SVG onload code executes. The installation interface must remain reachable, and a user must submit the crafted field value and load the returned page for the script to run in that browser.

The record

CVE
CVE-2023-43875
Published
Oct 19, 2023
Updated
Sep 12, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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.

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

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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