CVE-2026-34907Network attack vector

Browser script execution via unneutralized locale parameter

Published Jun 2, 2026 · Updated Jun 2, 2026

Reflected XSS in Wirtualna Uczelnia allows remote attackers to execute injected JavaScript in a victim's browser via a crafted URL. Multiple endpoints reflect the attacker-controlled locale parameter into generated pages without neutralizing executable script content. A victim must open the crafted link, after which the injected code runs in that victim's browser.

CVSS severity5.1
Medium
EPSS probability0.29%
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 Wirtualna Uczelnia allows remote attackers to execute injected JavaScript in a victim's browser via a crafted URL. Multiple endpoints reflect the attacker-controlled locale parameter into generated pages without neutralizing executable script content. A victim must open the crafted link, after which the injected code runs in that victim's browser.

The record

CVE
CVE-2026-34907
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
Simple S.A.
Product
Wirtualna Uczelnia
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 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 <=wu#2016.437.295#0#20260327_105545

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Simple S.A. · Wirtualna Uczelniaversion=0 <=wu#2016.437.295#0#20260327_105545

Published CVSS scores

5.1INCIBE-CERTCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1189Drive-by Compromise

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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