CVE-2020-21434
CVE-2020-21434 is a medium-severity vulnerability in Maccms 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: 3.5
- EPSS exploit prediction: 1% (39th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Maccms
- Published:
- Last modified:
Description
Maccms 10 contains a cross-site scripting (XSS) vulnerability in the Editing function under the Member module. This vulnerability is exploited via a crafted payload in the nickname text field.
Frequently asked questions
- What is CVE-2020-21434?
- Maccms 10 contains a cross-site scripting (XSS) vulnerability in the Editing function under the Member module. This vulnerability is exploited via a crafted payload in the nickname text field.
- How severe is CVE-2020-21434?
- CVE-2020-21434 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2020-21434 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-21434?
- CVE-2020-21434 affects Maccms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-21434?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-21434 published?
- CVE-2020-21434 was published on 2021-10-04 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:maccms:maccms:10.0:*:*:*:*:*:*:*
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