CVE Intelligence
Medium

CVE-2025-32916 — Sensitive form data in URL query parameters

Potential use of sensitive information in GET requests in Checkmk GmbH's Checkmk versions <2.4.0p13, <2.3.0p38, <2.2.0p46, and 2.1.0 (EOL) may cause sensitive form data to be included in URL query parameters, which may be logged in various places such as browser history or web server logs.

Published Oct 9, 2025 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Checkmk

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+1
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.19%
ahead of 8% of scored CVEs · Oct 21, 2026
Affects
Checkmk
Checkmk
CVSS base
4.3
Medium · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Checkmk Checkmk).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  4. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
  5. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Checkmk Checkmk version 2.3.0-p24version 2.3.0-p35version 2.3.0-p34version 2.3.0-p33version 2.3.0-p32version 2.3.0-p31version 2.3.0-p30version 2.3.0-p3
and 87 more version 2.3.0-p29version 2.3.0-p28version 2.3.0-p27version 2.3.0-p26version 2.3.0-p25version 2.3.0-p36version 2.3.0-p23version 2.3.0-p22version 2.3.0-p21version 2.3.0-p20version 2.3.0-p2version 2.3.0-p19version 2.3.0-p18version 2.3.0-p17version 2.3.0-p16version 2.3.0-p15version 2.3.0-p14version 2.4.0-p12version 2.4.0-p9version 2.4.0-p8version 2.4.0-p7version 2.4.0-p6version 2.4.0-p5version 2.4.0-p4version 2.4.0-p3version 2.4.0-p2version 2.3.0-p13version 2.4.0-p11version 2.4.0-p10version 2.4.0-p1version 2.4.0version 2.3.0-p9version 2.3.0-p8version 2.3.0-p7version 2.3.0-p6version 2.3.0-p5version 2.3.0-p4version 2.3.0-p37version 2.2.0-p21version 2.2.0-p32version 2.2.0-p31version 2.2.0-p30version 2.2.0-p3version 2.2.0-p29version 2.2.0-p28version 2.2.0-p27version 2.2.0-p26version 2.2.0-p25version 2.2.0-p24version 2.2.0-p23version 2.2.0-p22version 2.2.0-p33version 2.2.0-p19version 2.2.0-p18version 2.2.0-p17version 2.2.0-p16version 2.2.0-p14version 2.2.0-p13version 2.2.0-p12version 2.2.0-p11version 2.2.0-p10version 2.2.0-p1version 2.2.0version 2.2.0-p44version 2.3.0-p12version 2.3.0-p11version 2.3.0-p10version 2.3.0-p1version 2.3.0version 2.2.0-p9version 2.2.0-p8version 2.2.0-p7version 2.2.0-p6version 2.2.0-p5version 2.2.0-p45≥ 2.1.0 and < 2.2.0version 2.2.0-p43version 2.2.0-p42version 2.2.0-p41version 2.2.0-p40version 2.2.0-p4version 2.2.0-p39version 2.2.0-p38version 2.2.0-p37version 2.2.0-p36version 2.2.0-p35version 2.2.0-p34
Vulnerable NIST National Vulnerability Database
Checkmk Checkmk version 2.1.0≥ 2.2.0 and < 2.2.0p46≥ 2.3.0 and < 2.3.0p38≥ 2.4.0 and < 2.4.0p13 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
1.0 CVSS 4.0 Low — — security@checkmk.com via NIST National Vulnerability Database
1.0 CVSS 4.0 Low — — Checkmk via CVE Program (cve.org) e CISA ADP
4.3 CVSS 3.1 Medium 2.8 1.4 nvd@nist.gov via NIST National Vulnerability Database
4.3 CVSS 3.1 Medium — — GitHub, Inc. via GitHub Security Advisories
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-598

Other CVEs with this weakness →

EPSS over time FIRST

Oct 19, 2026 → Oct 21, 2026 · 3 reading(s) · max 0.19%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · checkmk gmbh/checkmk
    Oct 19, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 19, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 19, 2026
  • CVSS changed · 4.3
    Oct 19, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 19, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 19, 2026 · NIST National Vulnerability Database
  • 2025
  • CVE published
    Oct 9, 2025 · Checkmk

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 19, 2026 – Oct 19, 2026
  • 1× Official description updated · Oct 19, 2026 – Oct 19, 2026

References

3 on the record

Elsewhere on this site

Checkmk
every CVE for this vendor
CWE-598
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-113461 mk-oracle: Local privilege escalation via insecure Oracle Home library loading 20h
  • CVE-2026-14452 Open redirect and XSS via reset_url parameter 6d
  • CVE-2026-105331 mk-oracle: Local privilege escalation via malicious Oracle Instant Client 14d
  • CVE-2026-92882 Redact SNMP community, SNMPv3 pass phrases, and IPMI password in host config REST API GET responses Sep 22, 2026
  • CVE-2026-90990 Livestatus injection via monitoring filter values Sep 22, 2026
  • CVE-2026-77021 Missing decompression size limit in agent receiver allows memory exhaustion via push agent data Sep 21, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-32916 is "Sensitive form data in URL query parameters", rated Medium. It affects Checkmk (Checkmk); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 4.3 describes technical severity. EPSS 0.19% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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