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CVE-2021-3325

30
FAUCET Score

CVE-2021-3325 describes a critical authentication bypass vulnerability in Monitorix version 3.13.0, affecting default installations of Monitorix and Fedora Project distributions. This flaw allows remote attackers to bypass Basic Authentication due to an incomplete implementation of a new access-control feature. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, its high severity warrants immediate attention for affected systems.

Impacted Technologies

VendorProductVersion(s)CPE
3.13.0CPE matchmatch criteria
cpe:2.3:a:fibranet:monitorix:3.13.0:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 70th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / mikaku/Monitorix/commit/d6816e20da1a98bcdc6372d9c36a093df5238f4a
PatchThird Party Advisory
github.com / mikaku/Monitorix/compare/v3.13.0...v3.13.1
PatchThird Party Advisory
github.com / mikaku/Monitorix/issues/309
ExploitIssue TrackingThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/67DDUU56LP76AJ2K7WJ733QPL2FHKKNG
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/IGG6WK44CYY6GEFRTCUEDANVNSX5NDH7
monitorix.org / news.html
Release NotesVendor Advisory