CVE-2017-16821
CVE-2017-16821 is a medium-severity vulnerability in B3log Symphony 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: 0% (38th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: B3log Symphony
- Published:
- Last modified:
Description
b3log Symphony (aka Sym) 2.2.0 has XSS in processor/AdminProcessor.java in the admin console, as demonstrated by a crafted X-Forwarded-For HTTP header that is mishandled during display of a client IP address in /admin/user/userid.
Frequently asked questions
- What is CVE-2017-16821?
- b3log Symphony (aka Sym) 2.2.0 has XSS in processor/AdminProcessor.java in the admin console, as demonstrated by a crafted X-Forwarded-For HTTP header that is mishandled during display of a client IP address in /admin/user/userid.
- How severe is CVE-2017-16821?
- CVE-2017-16821 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-2017-16821 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-16821?
- CVE-2017-16821 affects B3log Symphony. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2017-16821?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2017-16821 published?
- CVE-2017-16821 was published on 2017-11-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:b3log:symphony:2.2.0:*:*:*:*:*:*:*
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