CVE-2019-16717Public exploit

Script execution via multipart and signature sanitization

Published Jan 6, 2020 · Updated Aug 5, 2024

Cross-site scripting in OX Software OX App Suite 7.10.2 and earlier allows attackers to execute script code in a user's browser. The backend trusts modified multipart filenames and content types when downloading inline PNG mail parts, while the signature source editor accepts malformed double-tagged script markup. Exploitation requires a recipient to follow a crafted mail-part URL or an authenticated user to paste the markup and induce user interaction, enabling session theft or unwanted web-interface actions.

CVSS severity3.1
Low
EPSS probability1.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in OX Software OX App Suite 7.10.2 and earlier allows attackers to execute script code in a user's browser. The backend trusts modified multipart filenames and content types when downloading inline PNG mail parts, while the signature source editor accepts malformed double-tagged script markup. Exploitation requires a recipient to follow a crafted mail-part URL or an authenticated user to paste the markup and induce user interaction, enabling session theft or unwanted web-interface actions.

The record

CVE
CVE-2019-16717
Published
Jan 6, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-80, T1204.001
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.1OX Software GmbHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
2.2OX Software GmbHCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1204.001Malicious Link

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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