How severe is CVE-2017-16521?

CVE-2017-16521 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-16521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-16521?

CVE-2017-16521 affects Inedo Buildmaster. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-16521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-16521 published?

CVE-2017-16521 was published on 2017-11-10 and last updated on 2026-06-17.

CVE-2017-16521

CVE-2017-16521 is a critical-severity vulnerability in Inedo Buildmaster with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Inedo Buildmaster
Published: 2017-11-10
Last modified: 2026-06-17

Description

In Inedo BuildMaster before 5.8.2, XslTransform was used where XslCompiledTransform should have been used.

Frequently asked questions

What is CVE-2017-16521?: In Inedo BuildMaster before 5.8.2, XslTransform was used where XslCompiledTransform should have been used.
How severe is CVE-2017-16521?: CVE-2017-16521 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-16521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16521?: CVE-2017-16521 affects Inedo Buildmaster. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-16521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-16521 published?: CVE-2017-16521 was published on 2017-11-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:inedo:buildmaster:*:*:*:*:*:*:*:*

More vulnerabilities in Inedo Buildmaster

CVE-2017-16520 — High (CVSS 7.5): Inedo BuildMaster before 5.8.2 does not properly restrict creation of RequireManageAllPrivileges event listeners.
CVE-2017-16761 — Medium (CVSS 6.1): An Open Redirect vulnerability in Inedo BuildMaster before 5.8.2 allows remote attackers to redirect users to arbitrary…
CVE-2017-16760 — Medium (CVSS 6.1): Inedo BuildMaster before 5.8.2 has XSS.

All CVEs affecting Inedo Buildmaster →