CVE-2026-48221Network attack vector

Authenticated script execution via unescaped hidden input

Published May 21, 2026 · Updated May 21, 2026

Reflected XSS in Open ISES Tickets CAD before 3.44.2 allows remote authenticated users to execute JavaScript via a crafted POST request. In ics205a.php, the frm_add_str POST value is written directly into a hidden input value attribute without HTML attribute encoding. Exploitation requires an authenticated request and victim interaction, causing attacker-supplied script to run in the victim's browser origin.

CVSS severity5.1
Medium
EPSS probability0.21%
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 Open ISES Tickets CAD before 3.44.2 allows remote authenticated users to execute JavaScript via a crafted POST request. In ics205a.php, the frm_add_str POST value is written directly into a hidden input value attribute without HTML attribute encoding. Exploitation requires an authenticated request and victim interaction, causing attacker-supplied script to run in the victim's browser origin.

The record

CVE
CVE-2026-48221
Published
May 21, 2026
Updated
May 21, 2026
Vendor
Open ISES
Product
Tickets CAD
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2026CVE publishedPublication date reported by the CVE source.
  2. May 21, 2026Record 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=0 <3.44.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open ISES · Tickets CADversion=0 <3.44.2

Published CVSS scores

5.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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')
T1203Exploitation for Client Execution

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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