CVE-2021-21803 json
This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications.
published 2021-07-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8975
- cvss
- 9.6
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 7.9%
- EPSS 7.9% chance of exploitation in 30 days, percentile 94%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.
Exploit prediction
7.90% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Advantech R-SeeNet - Cross-Site Scripting nuclei detection template
- talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2021-1272 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 9.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- n/a Advantech
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
talosintelligence.com
/vulnerability_reports/TALOS-2021-1272
exploit, third-party-advisory
Sources
- CVE List CVE-2021-21803
- NVD CVE-2021-21803
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.