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CVE-2021-29643

19
FAUCET Score

CVE-2021-29643 describes a stored cross-site scripting (XSS) vulnerability in Paessler PRTG Network Monitor versions prior to 21.3.69.1333. This medium-severity flaw (CVSS 5.4) allows an authenticated attacker to inject malicious scripts through unsanitized strings imported from Active Directory User Objects, leading to potential information disclosure or limited integrity impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 21.3.69.1333CPE matchmatch criteria
cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0061 is in the 75th percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

raxis.com / blog/prtg-network-monitor-cve-2021-29643
ExploitThird Party Advisory
paessler.com / prtg/history/stable
Vendor Advisory