CVE-2020-29028Public exploitNetwork attack vector

Unauthenticated script execution via unsanitized op parameter

Published Mar 5, 2021 · Updated Sep 17, 2024

Cross-site scripting in Secomea GateManager before 9.4 allows remote attackers to execute JavaScript in a user's browser via crafted URLs. The gui.cgi endpoint reflects the op query parameter into its response without sanitization, so script supplied in that parameter runs when the page is rendered. Exploitation requires a victim to navigate to the crafted link; the demonstrated impact is client-side script execution with potential access to the victim's web session context.

CVSS severity6.1
Medium
EPSS probability0.65%
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 Secomea GateManager before 9.4 allows remote attackers to execute JavaScript in a user's browser via crafted URLs. The gui.cgi endpoint reflects the op query parameter into its response without sanitization, so script supplied in that parameter runs when the page is rendered. Exploitation requires a victim to navigate to the crafted link; the demonstrated impact is client-side script execution with potential access to the victim's web session context.

The record

CVE
CVE-2020-29028
Published
Mar 5, 2021
Updated
Sep 17, 2024
Vendor
Secomea
Product
GateManager
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 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=all <9.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Secomea · GateManagerversion=all <9.4

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.3Secomea A/SCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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