CVE-2017-1000054: Rocket.Chat version 0.8.0 and newer is vulnerable to XSS in the markdown link parsing code for messages.

Routine

MEDIUM 6.1DOWNGRADE

CVE-2017-1000054 is a medium-severity flaw (CVSS 6.1) affecting rocket.chat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Rocket.Chat version 0.8.0 and newer is vulnerable to XSS in the markdown link parsing code for messages.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-07-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: rocketchat

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

Am I affected?

Timeline

2017-07-17 13:18 UTCPublished CVE record published
2026-06-17 00:58 UTCUpdated Record last modified

rocketchat rocket.chat DOWNGRADE

Affected: 0.8.0 · 0.9.0 · 0.10.0 · 0.10.1 · 0.10.2 · 0.11.0 · 0.12.0 · 0.12.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.0

1. Check installed version

apt-cache policy rocket.chat || rpm -q rocket.chat || rocket.chat --version

2. No fixed release: DOWNGRADE to a release before 0.8.0 (Debian / Ubuntu)

apt-cache madison rocket.chat sudo apt install rocket.chat=<VERSION_BEFORE_0.8.0> sudo apt-mark hold rocket.chat

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list rocket.chat sudo dnf downgrade rocket.chat-<VERSION_BEFORE_0.8.0> sudo dnf versionlock add rocket.chat

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-2017-1000054?

rocket.chat: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-1000054 being exploited?

CVE-2017-1000054 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-2017-1000054 affect?

CVE-2017-1000054 affects rocket.chat. Severity is medium (CVSS 6.1). Rocket.Chat version 0.8.0 and newer is vulnerable to XSS in the markdown link parsing code for messages.

How urgent is CVE-2017-1000054?

Priority 35/100. No elevated risk signals yet.

Software pages

Rocket.Chat vulnerabilities

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References

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