CVE-2021-42703
CVE-2021-42703 is a medium-severity vulnerability in Advantech Webaccess Hmi Designer with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (45th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Advantech Webaccess Hmi Designer
- Published:
- Last modified:
Description
This vulnerability could allow an attacker to send malicious Javascript code resulting in hijacking of the user’s cookie/session tokens, redirecting the user to a malicious webpage, and performing unintended browser action.
Frequently asked questions
- What is CVE-2021-42703?
- This vulnerability could allow an attacker to send malicious Javascript code resulting in hijacking of the user’s cookie/session tokens, redirecting the user to a malicious webpage, and performing unintended browser action.
- How severe is CVE-2021-42703?
- CVE-2021-42703 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-42703 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42703?
- CVE-2021-42703 affects Advantech Webaccess Hmi Designer. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-42703?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-42703 published?
- CVE-2021-42703 was published on 2021-11-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:advantech:webaccess_hmi_designer:*:*:*:*:*:*:*:*
More vulnerabilities in Advantech Webaccess Hmi Designer
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- CVE-2018-8837 — High (CVSS 7.8): Processing specially crafted .pm3 files in Advantech WebAccess HMI Designer 2.1.7.32 and prior may cause the system to…
- CVE-2018-8835 — High (CVSS 7.8): Double free vulnerabilities in Advantech WebAccess HMI Designer 2.1.7.32 and prior caused by processing specially…
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