CVE-2024-28833 | Missing brute-force protection for two factor authentication

Improper restriction of excessive authentication attempts with two factor authentication methods in Checkmk 2.3 before 2.3.0p6 facilitates brute-forcing of second factor mechanisms.

Published: 2024-06-10 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-28833 is rated Low Risk (34.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.39%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-28833

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.33% 0.39% +0.06%
2 2025-11-21 0.20% 0.33% +0.13%
3 2025-11-18 — 0.20% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-28833

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-28833

OS Trackers for CVE-2024-28833

vendor priority summary link
ubuntu medium CVE-2024-28833 medium priority: Ubuntu including 1 source packages (check-mk), 10 status rows across 10 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, upstream, xenial): DNE 7, needs-triage 3. https://ubuntu.com/security/CVE-2024-28833

Affected software / configurations for CVE-2024-28833

Vendor Product Version Raw CPE
checkmk checkmk 2.3.0 cpe:2.3:a:checkmk:checkmk:2.3.0:p1:*:*:*:*:*:*
checkmk checkmk 2.3.0 cpe:2.3:a:checkmk:checkmk:2.3.0:p2:*:*:*:*:*:*
checkmk checkmk 2.3.0 cpe:2.3:a:checkmk:checkmk:2.3.0:p3:*:*:*:*:*:*
checkmk checkmk 2.3.0 cpe:2.3:a:checkmk:checkmk:2.3.0:p4:*:*:*:*:*:*
checkmk checkmk 2.3.0 cpe:2.3:a:checkmk:checkmk:2.3.0:p5:*:*:*:*:*:*

References for CVE-2024-28833

URL Tags
https://checkmk.com/werk/16830 Vendor Advisory
cvelogic Threat Intelligence