CVE-2021-28109Network attack vector

Reflected XSS via unsanitized URL content

Published Mar 19, 2021 · Updated Aug 3, 2024

Reflected XSS in login_tw.php in Compass Plus TranzWare (POI) FIMI before 4.2.20.4.2 allows remote attackers to run script in a user's browser. The endpoint uses part of the requested URL to build its response without proper sanitization, reflecting attacker-controlled markup into the page. Exploitation requires a user to open a crafted URL, after which script runs in the affected page origin and can read or modify browser-accessible data.

CVSS severity6.1
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in login_tw.php in Compass Plus TranzWare (POI) FIMI before 4.2.20.4.2 allows remote attackers to run script in a user's browser. The endpoint uses part of the requested URL to build its response without proper sanitization, reflecting attacker-controlled markup into the page. Exploitation requires a user to open a crafted URL, after which script runs in the affected page origin and can read or modify browser-accessible data.

The record

CVE
CVE-2021-28109
Published
Mar 19, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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