CVE-2026-54217Public exploitNetwork attack vector

Browser-context script execution via unsanitized email rendering

Published Aug 7, 2026 · Updated Aug 7, 2026

Stored XSS in TeamDavid Webbox through Rollout 524 allows remote attackers to execute JavaScript when a recipient opens a crafted email. Webbox stores attacker-supplied JavaScript in an inbound email and renders it without adequate input validation when the message is opened. Delivery requires no TeamDavid account, but execution requires a recipient to open the message; the script runs in the recipient's browser context.

CVSS severity5.3
Medium
EPSS probability0.33%
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 TeamDavid Webbox through Rollout 524 allows remote attackers to execute JavaScript when a recipient opens a crafted email. Webbox stores attacker-supplied JavaScript in an inbound email and renders it without adequate input validation when the message is opened. Delivery requires no TeamDavid account, but execution requires a recipient to open the message; the script runs in the recipient's browser context.

The record

CVE
CVE-2026-54217
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
Tobit Laboratories AG
Product
TeamDavid
Classifications
CWE-20, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 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=0 <=Rollout 524

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tobit Laboratories AG · TeamDavidversion=0 <=Rollout 524

Published CVSS scores

5.3Switzerland Government Common Vulnerability ProgramCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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 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-20Improper Input Validation
T1204User 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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