CVE-2021-3628Network attack vector

Authenticated browser code execution via unneutralized uuid input

Published Aug 30, 2021 · Updated Sep 17, 2024

Authenticated XSS in OpenKM Community Edition 6.3.10 allows remote authenticated users to inject code through the uuid parameter. Public sources do not identify the affected handler, but they establish that uuid input reaches generated page output without required neutralization. A victim must interact with the crafted content, after which the script runs in the victim's browser context and can read or alter data available to that session.

CVSS severity4.6
Medium
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authenticated XSS in OpenKM Community Edition 6.3.10 allows remote authenticated users to inject code through the uuid parameter. Public sources do not identify the affected handler, but they establish that uuid input reaches generated page output without required neutralization. A victim must interact with the crafted content, after which the script runs in the victim's browser context and can read or alter data available to that session.

The record

CVE
CVE-2021-3628
Published
Aug 30, 2021
Updated
Sep 17, 2024
Vendor
OpenKM
Product
OpenKM Community Edition
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=6.3.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenKM · OpenKM Community Editionversion=6.3.10

Published CVSS scores

4.6INCIBECVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')

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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