CVE-2021-44197Network attack vector

Browser script execution

Published Mar 7, 2023 · Updated May 18, 2026

Basic XSS in UBIT OİS before 20211126 allows remote attackers to execute script in a user's browser through crafted web input. The publisher has not disclosed the affected endpoint, input parameter, or precise failure to neutralize script-related HTML tags. Exploitation requires a user to interact with attacker-controlled content, after which script runs in that user's web security context and can read or alter page data.

CVSS severity6.1
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Basic XSS in UBIT OİS before 20211126 allows remote attackers to execute script in a user's browser through crafted web input. The publisher has not disclosed the affected endpoint, input parameter, or precise failure to neutralize script-related HTML tags. Exploitation requires a user to interact with attacker-controlled content, after which script runs in that user's web security context and can read or alter page data.

The record

CVE
CVE-2021-44197
Published
Mar 7, 2023
Updated
May 18, 2026
Vendor
UBİT Bilgi Teknolojileri Enerji ve Danışmanlık Hizmetleri San. Tic. A.Ş.
Product
OİS (Öğrenci Bilgi Yönetim Sistemi)
Classifications
CWE-79, CWE-80, CAPEC-63, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2023CVE publishedPublication date reported by the CVE source.
  2. May 18, 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 <20211126

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

UBİT Bilgi Teknolojileri Enerji ve Danışmanlık Hizmetleri San. Tic. A.Ş. · OİS (Öğrenci Bilgi Yönetim Sistemi)version=0 <20211126

Published CVSS scores

6.1Computer Emergency Response Team of the Republic of TurkeyCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CAPEC-63Cross-Site Scripting (XSS)
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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