CVE-2020-21495
CVE-2020-21495 is a medium-severity vulnerability in Xiuno Xiunobbs with a CVSS 3.x base score of 6.1. 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 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Xiuno Xiunobbs
- Published:
- Last modified:
Description
A cross-site scripting (XSS) vulnerability in the component /admin/?setting-base.htm of Xiuno BBS 4.0.4 allows attackers to execute arbitrary web scripts or HTML via the sitename parameter.
Frequently asked questions
- What is CVE-2020-21495?
- A cross-site scripting (XSS) vulnerability in the component /admin/?setting-base.htm of Xiuno BBS 4.0.4 allows attackers to execute arbitrary web scripts or HTML via the sitename parameter.
- How severe is CVE-2020-21495?
- CVE-2020-21495 has a CVSS 3.x base score of 6.1, 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-2020-21495 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-21495?
- CVE-2020-21495 affects Xiuno Xiunobbs. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-21495?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-21495 published?
- CVE-2020-21495 was published on 2021-10-04 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:xiuno:xiunobbs:4.0.4:*:*:*:*:*:*:*
More vulnerabilities in Xiuno Xiunobbs
- CVE-2019-19998 — High (CVSS 7.5): Xiuno BBS 4.0 allows XXE via plugin/xn_wechat_public/route/token.php.
- CVE-2020-19914 — Medium (CVSS 6.1): Cross Site Scripting (XSS) in xiunobbs 4.0.4 allows remote attackers to execute arbitrary web script or HTML via the…
- CVE-2020-21496 — Medium (CVSS 6.1): A cross-site scripting (XSS) vulnerability in the component /admin/?setting-base.htm of Xiuno BBS 4.0.4 allows…
- CVE-2020-21494 — Medium (CVSS 6.1): A cross-site scripting (XSS) vulnerability in the component install\install.sql of Xiuno BBS 4.0.4 allows attackers to…
- CVE-2018-15559 — Medium (CVSS 6.1): The editor in Xiuno BBS 4.0.4 allows stored XSS.
- CVE-2020-21493 — Medium (CVSS 5.3): An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
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