CVE-2026-0521Public exploitNetwork attack vector

Session hijacking via unescaped PDF error parameter

Published Feb 6, 2026 · Updated Feb 6, 2026

Reflected XSS in TYDAC AG MAP+ 3.4.0 allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. The processPDFdocument.php PDF export handler reflects the site parameter unescaped in an HTML error response when export processing fails. Exploitation requires a victim with an existing MAP+ session cookie to open the URL; injected script can read that cookie and hijack the session.

CVSS severity6.1
Medium
EPSS probability0.27%
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 TYDAC AG MAP+ 3.4.0 allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. The processPDFdocument.php PDF export handler reflects the site parameter unescaped in an HTML error response when export processing fails. Exploitation requires a victim with an existing MAP+ session cookie to open the URL; injected script can read that cookie and hijack the session.

The record

CVE
CVE-2026-0521
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, CAPEC-63, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 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?

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

5.6Switzerland Government Common Vulnerability ProgramCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
6.1NIST National Vulnerability DatabaseCVSS: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')
CAPEC-63Cross-Site Scripting (XSS)
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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