CVE-2017-0912: Ubiquiti UCRM versions 2.5.0 to 2.7.7 are vulnerable to Stored Cross-site Scripting

Routine

MEDIUM 5.4UPGRADE

CVE-2017-0912 is a medium-severity flaw (CVSS 5.4) affecting ucrm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ubiquiti UCRM versions 2.5.0 to 2.7.7 are vulnerable to Stored Cross-site Scripting. Due to the lack sanitization, it is possible to inject arbitrary HTML code by manipulating the uploaded filename. Successful exploitation requires valid credentials to an account with "Edit" access to "Scheduling".

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-07-03
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: ui

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

Am I affected?

Timeline

2018-07-03 21:29 UTCPublished CVE record published
2026-06-17 00:58 UTCUpdated Record last modified

ui ucrm UPGRADE

Affected: >= 2.5.0 and <= 2.7.7

Fixed in: newer than 2.7.7

Safe to downgrade to: a release before 2.5.0

1. Check installed version

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

2. UPGRADE to newer than 2.7.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ucrm

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2.5.0 (Debian / Ubuntu)

apt-cache madison ucrm sudo apt install ucrm=<VERSION_BEFORE_2.5.0> sudo apt-mark hold ucrm

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ucrm sudo dnf downgrade ucrm-<VERSION_BEFORE_2.5.0> sudo dnf versionlock add ucrm

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2017-0912?

ucrm: upgrade to newer than 2.7.7. Exact commands for each OS are on this page.

Is CVE-2017-0912 being exploited?

CVE-2017-0912 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-2017-0912 affect?

CVE-2017-0912 affects ucrm. Severity is medium (CVSS 5.4). Ubiquiti UCRM versions 2.5.0 to 2.7.7 are vulnerable to Stored Cross-site Scripting. Due to the lack sanitization, it is possible to inject arbitrary HTML code by manipulating the uploaded filename. Successful exploitation requires valid cr

How urgent is CVE-2017-0912?

Priority 30/100. No elevated risk signals yet.

Software pages

Ubiquiti vulnerabilities

Related CVEs

CVE-2017-0913 MEDIUM 4.7 UPGRADE Ubiquiti UCRM versions 2.3.0 to 2.7.7 allow an authenticated user to read arbitrary files in the local file sy

References

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