TI-2021-10343 Aliases CVE-2021-29643 GHSA-w56q-wh4x-c2m7

PRTG Network Monitor before 21.3.69.1333 allows stored XSS via an unsanitized string…

LOW 25CWE-79Published 2021-09-13 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

PRTG Network Monitor before 21.3.69.1333 allows stored XSS via an unsanitized string imported from a User Object in a connected Active Directory instance.

Why it matters now

EPSS 0.00609 49th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:paessler:prtg_network_monitor::::::::	before 21.3.69.1333	Vulnerable	Paessler

cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:* Versions before 21.3.69.1333 Vulnerable ·Paessler

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-29643
2026-10-03 Alias added: GHSA-w56q-wh4x-c2m7

References

Exploit 1

https://raxis.com/blog/prtg-network-monitor-cve-2021-29643

Advisory 1

https://www.paessler.com/prtg/history/stable#21.3.69.1333

TI-2018-13743 PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to… KEVCVSS 3.1CRITICAL 9.8
TI-2018-06724 An issue was discovered in PRTG Network Monitor before 18.2.39. KEVCVSS 3.1HIGH 7.2
TI-2023-16035 A command injection was identified in PRTG 23.2.84.1566 and earlier versions in the Dicom… CVSS 3.1HIGH 7.2
TI-2022-16181 PRTG Network Monitor through 22.2.77.2204 does not prevent custom input for a device’s… CVSS 3.1MEDIUM 5.3
TI-2020-09265 PRTG Network Monitor before 20.1.57.1745 allows remote unauthenticated attackers to… CVSS 3.1MEDIUM 5.3
TI-2020-08308 A webserver component in Paessler PRTG Network Monitor 19.2.50 to PRTG 20.1.56 allows… CVSS 3.1CRITICAL 9.8

See all 38 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences