Security Digest · Vulnerability record
CVE-2026-25893: FUXA Unauthenticated Remote Code Execution via Admin JWT Minting
FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software.
CVSS 10.0 Critical EPSS 1.2% · p68
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 1.2%, percentile 68: FIRST’s model estimates a 1.2% chance of exploitation activity in the next 30 days, higher than 68% of all scored CVEs (moderate). 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
fuxa-server(npm) <= 1.2.9, fixed in 1.2.10. Check your lockfile, including transitive dependencies.
What it is
FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. Prior to 1.2.10, an authentication bypass vulnerability in FUXA allows an unauthenticated, remote attacker to gain administrative access via the heartbeat refresh API and execute arbitrary code on the server. This issue has been patched in FUXA version 1.2.10.
From the GitHub advisory
Note GitHub incorrectly stated this vulnerability is identical to CVE-2025-69970, which describes the fact that authentication is disabled by default. This advisory describes an exploit chain that enables authentication bypass via the heartbeat refresh endpoint when authentication is enabled. This misleads users into thinking that enabling authentication would mitigate this vulnerability. Please see the patch for more information: https://github.com/frangoteam/FUXA/commit/fe82348d160904d0013b9a3e267d50158f5c7afb.
Description An authentication bypass vulnerability in FUXA allows an unauthenticated, remote attacker to gain administrative access via the heartbeat refresh API and execute arbitrary code on the server. This affects FUXA through version 1.2.9 when authentication is enabled. This issue has been patched in FUXA version 1.2.10.
Impact Affected deployments are those with runtime.settings.secureEnabled set to true.
Exploitation allows an unauthenticated, remote attacker to bypass all authentication mechanisms and obtain administrative access to the FUXA instance by minting administrator JWTs via the heartbeat refresh endpoint. With these elevated privileges, the attacker can interact with administrative APIs, including intended features designed for automation and scripting, to execute arbitrary code in the context of the FUXA service. Depending on deployment configuration and permissions, this may lead to full system compromise and could further expose connected ICS/SCADA environments to follow-on actions.
Patches This issue has been patched in FUXA version 1.2.10. Users are strongly encouraged to update to the latest available release.
Weakness type: CWE-285, CWE-287.
Product: fuxa-server (npm) · Assigned by: GitHub_M · Published: 2026-02-09
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| npm | fuxa-server | <= 1.2.9 | 1.2.10 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| frangoteam | FUXA | < 1.2.10 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_M | 4.0 | 10 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| GitHub | 4.0 | 10.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
- 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): 1.21% probability of exploitation activity in the next 30 days; percentile 68.
Timeline
- — GitHub-reviewed advisory GHSA-vwcg-c828-9822 published (critical)
- — CVE record published by GitHub_M
- — CVE record last updated
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-vwcg-c828-9822 github.com
- CVE.org record CVE-2026-25893 cve.org
- NVD entry CVE-2026-25893 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- github.com github.com