MaxTime: Path Traversal: '.../...//'
CVE-2025-26356 is a high-severity path traversal: '.../...//' vulnerability in MaxTime from Q-Free, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected MaxTime versions: 2.11.0 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.84% chance of exploitation within 30 days, higher than 58% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of MaxTime you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (nozominetworks.com).
Official description
A CWE-35 "Path Traversal" in maxtime/api/database/database.lua (setActive endpoint) in Q-Free MaxTime less than or equal to version 2.11.0 allows an authenticated remote attacker to overwrite sensitive files via crafted HTTP requests.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Path Traversal: '.../...//'
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '.../...//' (doubled triple dot slash) sequences that can resolve to a location that is outside of that directory.
How developers prevent this class of flaw
- Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- nozominetworks.com/labs/vulnerability-advisories-cve-2025-26356Third Party Advisory
Other vulnerabilities in MaxTime
- 8.8 High severity
- 8.1 High severity
- 8.8 High severity
- 8.1 High severity
- 8.8 High severity
- 7.1 High severity
Recent Path Traversal: '.../...//' vulnerabilities
- 7.2 High severity
- 8.1 High severity
- 8.6 High severity
- 9.3 Critical severity
- 8.3 High severity
- 7.3 High severity
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