CVE-2021-30057Public exploitNetwork attack vector

Stored HTML injection via analytical-driver metadata

Published Apr 5, 2021 · Updated Aug 3, 2024

Stored HTML injection in Knowage Suite 7.1 allows remote authenticated users to inject arbitrary HTML through analytical-driver metadata. The analyticalDrivers REST endpoint accepts LABEL and NAME values in a POST request, stores them without HTML neutralization, and renders the saved markup whenever the driver is searched for or displayed. Administrative access is required to create or edit a driver, and another user's interaction with the affected page exposes that user to persistent attacker-controlled content.

CVSS severity4.8
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored HTML injection in Knowage Suite 7.1 allows remote authenticated users to inject arbitrary HTML through analytical-driver metadata. The analyticalDrivers REST endpoint accepts LABEL and NAME values in a POST request, stores them without HTML neutralization, and renders the saved markup whenever the driver is searched for or displayed. Administrative access is required to create or edit a driver, and another user's interaction with the affected page exposes that user to persistent attacker-controlled content.

The record

CVE
CVE-2021-30057
Published
Apr 5, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 5, 2021CVE 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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

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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