CVE-2022-39840Network attack vector

Stored XSS via direct message

Published Sep 5, 2022 · Updated Aug 3, 2024

Stored cross-site scripting in Cotonti Siena 0.9.20 allows remote authenticated administrators to execute script in an administrator's browser through a crafted direct message. The public record identifies the direct-message storage and rendering path but does not disclose the specific input field, file, or sanitization operation that fails. Exploitation requires an authenticated administrator to submit the message and another administrator to view it; the demonstrated impact is script execution in that viewing session, with no evidence of service interruption.

CVSS severity4.8
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Cotonti Siena 0.9.20 allows remote authenticated administrators to execute script in an administrator's browser through a crafted direct message. The public record identifies the direct-message storage and rendering path but does not disclose the specific input field, file, or sanitization operation that fails. Exploitation requires an authenticated administrator to submit the message and another administrator to view it; the demonstrated impact is script execution in that viewing session, with no evidence of service interruption.

The record

CVE
CVE-2022-39840
Published
Sep 5, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/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.

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 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.

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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