CVE-2026-0521: A reflected cross-site scripting (XSS) vulnerability in the PDF export functionality of the TYDAC AG MAP+ solu

Routine

MEDIUM 6.1DOWNGRADE

CVE-2026-0521 is a medium-severity flaw (CVSS 6.1) affecting map\+. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A reflected cross-site scripting (XSS) vulnerability in the PDF export functionality of the TYDAC AG MAP+ solution allows unauthenticated attackers to craft a malicious URL, that if visited by a victim, will execute arbitrary JavaScript in the victim's context. Such a URL could be delivered through various means, for instance, by sending a link or by tricking victims to visit a page crafted by the attacker. This issue was verified in MAP+: 3.4

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-06
Last modified	2026-06-17

Publisher (CNA): Switzerland Government Common Vulnerability Program · Vendor: tydac

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-06 07:16 UTCPublished CVE record published
2026-06-17 10:10 UTCUpdated Record last modified

tydac map\+ DOWNGRADE

Affected: 3.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.4.0

1. Check installed version

apt-cache policy map+ || rpm -q map+ || map+ --version

2. No fixed release: DOWNGRADE to a release before 3.4.0 (Debian / Ubuntu)

apt-cache madison map+ sudo apt install map+=<VERSION_BEFORE_3.4.0> sudo apt-mark hold map+

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list map+ sudo dnf downgrade map+-<VERSION_BEFORE_3.4.0> sudo dnf versionlock add map+

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-0521?

map\+: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-0521 being exploited?

CVE-2026-0521 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-0521 affect?

CVE-2026-0521 affects map\+. Severity is medium (CVSS 6.1). A reflected cross-site scripting (XSS) vulnerability in the PDF export functionality of the TYDAC AG MAP+ solution allows unauthenticated attackers to craft a malicious URL, that if visited by a victim, will execute arbitrary JavaScript in

How urgent is CVE-2026-0521?

Priority 32/100. Public exploit reference

References

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