CVE-2023-5556Network attack vector

Reflected script execution via unescaped workspace URLs

Published Oct 12, 2023 · Updated Sep 18, 2024

Reflected XSS in Structurizr on-premises installation before 3194 allows remote attackers to execute script via crafted workspace URLs. The workspace-summary.jsp view inserts urlPrefix and urlSuffix into HTML attributes and JavaScript strings without c:out escaping. A victim must load the crafted URL, after which attacker-controlled script runs in the page origin and can read or alter data available to that browser session.

CVSS severity6.1
Medium
EPSS probability1.22%
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 Structurizr on-premises installation before 3194 allows remote attackers to execute script via crafted workspace URLs. The workspace-summary.jsp view inserts urlPrefix and urlSuffix into HTML attributes and JavaScript strings without c:out escaping. A victim must load the crafted URL, after which attacker-controlled script runs in the page origin and can read or alter data available to that browser session.

The record

CVE
CVE-2023-5556
Published
Oct 12, 2023
Updated
Sep 18, 2024
Vendor
Structurizr Limited
Product
Structurizr on-premises installation
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=0 <3194
  2. Affected versionversion=unspecified <3194

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Structurizr Limited · Structurizr on-premises installationversion=0 <3194; version=unspecified <3194

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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