Security Digest · Vulnerability record
CVE-2025-55037: TkEasyGUI Vulnerable to OS Command Injection
Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in TkEasyGUI versions prior to v1.0.22.
CVSS 9.3 Critical EPSS 2.3% · p83
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 2.3%, percentile 83: FIRST’s model estimates a 2.3% chance of exploitation activity in the next 30 days, higher than 83% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
TkEasyGUI(PyPI) < 1.0.22, fixed in 1.0.22. Check your lockfile, including transitive dependencies.
What it is
Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in TkEasyGUI versions prior to v1.0.22. If this vulnerability is exploited, an arbitrary OS command may be executed by a remote unauthenticated attacker if the settings are configured to construct messages from external sources.
From the GitHub advisory
Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in TkEasyGUI versions prior to v1.0.22. If this vulnerability is exploited, an arbitrary OS command may be executed by a remote unauthenticated attacker if the settings are configured to construct messages from external sources.
Weakness type: CWE-78.
Product: TkEasyGUI (PyPI) · Assigned by: jpcert · Published: 2025-09-05
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | TkEasyGUI | < 1.0.22 | 1.0.22 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| kujirahand | TkEasyGUI | versions prior to v1.0.22 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| jpcert | 3.0 | 9.8 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| jpcert | 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| GitHub | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 2.34% probability of exploitation activity in the next 30 days; percentile 83.
Timeline
- — CVE record last updated
- — CVE record published by jpcert
- — GitHub-reviewed advisory GHSA-hfrj-3w3g-jv32 published (critical)
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-hfrj-3w3g-jv32 github.com
- CVE.org record CVE-2025-55037 cve.org
- NVD entry CVE-2025-55037 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- jvn.jp jvn.jp