CVE-2021-47925Public exploitNetwork attack vector

Authenticated stored XSS via unsanitized cards and SVGs

Published May 10, 2026 · Updated May 10, 2026

Stored XSS in Tecnoteca CMDBuild 3.3.2 allows remote authenticated users to run script in other users' browsers via saved content. Employee card fields store HTML event handlers without neutralization, while attachment uploads accept script-bearing SVG files for preview. Low-privileged access to create a card or upload an attachment is required, and execution occurs when another user opens the relation graph or previews the SVG.

CVSS severity6.4
Medium
EPSS probability0.24%
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 Tecnoteca CMDBuild 3.3.2 allows remote authenticated users to run script in other users' browsers via saved content. Employee card fields store HTML event handlers without neutralization, while attachment uploads accept script-bearing SVG files for preview. Low-privileged access to create a card or upload an attachment is required, and execution occurs when another user opens the relation graph or previews the SVG.

The record

CVE
CVE-2021-47925
Published
May 10, 2026
Updated
May 10, 2026
Vendor
Tecnoteca
Product
CMDBuild
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 10, 2026CVE publishedPublication date reported by the CVE source.
  2. May 10, 2026Record 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=CMDBuild 3.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tecnoteca · CMDBuildversion=CMDBuild 3.3.2

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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