CVE-2017-16521: In Inedo BuildMaster before 5.8.2, XslTransform was used where XslCompiledTransform should have been used.

Q: How do I fix CVE-2017-16521?

buildmaster: upgrade to 5.8.2. Exact commands for each OS are on this page.

Q: Is CVE-2017-16521 being exploited?

CVE-2017-16521 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-16521 affect?

CVE-2017-16521 affects buildmaster. Severity is critical (CVSS 9.8). In Inedo BuildMaster before 5.8.2, XslTransform was used where XslCompiledTransform should have been used.

Q: How urgent is CVE-2017-16521?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2017-16521 is a critical-severity flaw (CVSS 9.8) affecting buildmaster. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Published	2017-11-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: inedo

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-11-10 09:29 UTCPublished CVE record published
2026-06-17 01:09 UTCUpdated Record last modified

inedo buildmaster UPGRADE

Affected: < 5.8.2

Fixed in: 5.8.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy buildmaster || rpm -q buildmaster || buildmaster --version

2. UPGRADE to 5.8.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade buildmaster

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade buildmaster

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-16521?

buildmaster: upgrade to 5.8.2. Exact commands for each OS are on this page.

Is CVE-2017-16521 being exploited?

CVE-2017-16521 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-16521 affect?

CVE-2017-16521 affects buildmaster. Severity is critical (CVSS 9.8). In Inedo BuildMaster before 5.8.2, XslTransform was used where XslCompiledTransform should have been used.

How urgent is CVE-2017-16521?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2017-16761 MEDIUM 6.1 UPGRADE An Open Redirect vulnerability in Inedo BuildMaster before 5.8.2 allows remote attackers to redirect users to
CVE-2017-16760 MEDIUM 6.1 UPGRADE Inedo BuildMaster before 5.8.2 has XSS.
CVE-2017-16520 HIGH 7.5 UPGRADE Inedo BuildMaster before 5.8.2 does not properly restrict creation of RequireManageAllPrivileges event listene

References

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