Cross Site Scripting (XSS) in Tasmota firmware 6.5.0 allows remote attackers to inject…
Priority MEDIUM 60CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
Cross Site Scripting (XSS) in Tasmota firmware 6.5.0 allows remote attackers to inject JavaScript code via a crafted string in the field "Friendly Name 1".
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00509 43rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:tasmota_project:tasmota:6.5.0:*:*:*:*:*:*:* | 6.5.0 | Vulnerable | Tasmota Project |
- cpe:2.3:o:tasmota_project:tasmota:6.5.0:*:*:*:*:*:*:* Versions 6.5.0 Vulnerable ·Tasmota Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36603
- 2026-10-03 Alias added: GHSA-qvg8-rx3x-c43j
References
More Tasmota Project Tasmota vulnerabilities
- TI-2022-21136 Tasmota before commit 066878da4d4762a9b6cb169fdf353e804d735cfd was discovered to contain… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-36603 · CVE Program
- CVE-2021-36603 · NVD
- FIRST EPSS
- GHSA-qvg8-rx3x-c43j · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences