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CVE-2021-33178

23
FAUCET Score

CVE-2021-33178 describes an authenticated path traversal vulnerability in NagVis versions prior to 1.9.29, specifically within the "Manage Backgrounds" functionality. This flaw allows a high-privileged attacker to arbitrarily delete files on the local system, leading to a high impact on integrity and availability, as reflected by its CVSS score of 6.5 (Medium). There is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. While there is minimal community discussion and media coverage, the vulnerability is not listed on CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.9.29CPE matchmatch criteria
cpe:2.3:a:nagvis:nagvis:*:*:*:*:*:nagios_xi:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.81%
Probability of exploitation in next 30 days
EPSS Percentile
76.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0181 is in the 83rd percentile among its peer group of 3,562 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

lists.debian.org / debian-lts-announce/2025/05/msg00000.html
nagvis.org / downloads/changelog/1.9.29
Release NotesVendor Advisory
synopsys.com / blogs/software-security/cyrc-advisory-nagios-xi
Third Party Advisory