CVE-2023-23917: A prototype pollution vulnerability exists in Rocket.Chat server <5.2.0 that could allow an attacker to a RCE

Q: How do I fix CVE-2023-23917?

rocket.chat: upgrade to 5.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-23917 being exploited?

CVE-2023-23917 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-2023-23917 affect?

CVE-2023-23917 affects rocket.chat. Severity is high (CVSS 8.8). A prototype pollution vulnerability exists in Rocket.Chat server <5.2.0 that could allow an attacker to a RCE under the admin account. Any user can create their own server in your cloud and become an admin so this vulnerability could affect

This month

HIGH 8.8UPGRADE

CVE-2023-23917 is a high-severity flaw (CVSS 8.8) affecting rocket.chat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A prototype pollution vulnerability exists in Rocket.Chat server <5.2.0 that could allow an attacker to a RCE under the admin account. Any user can create their own server in your cloud and become an admin so this vulnerability could affect the cloud infrastructure. This attack vector also may increase the impact of XSS to RCE which is dangerous for self-hosted users as well.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-77, CWE-1321
Published	2023-02-23
Last modified	2026-10-24

Publisher (CNA): HackerOne · Vendor: rocket.chat

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-02-23 20:15 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

rocket.chat rocket.chat UPGRADE

Affected: < 5.2.0

Fixed in: 5.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 5.2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rocket.chat

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rocket.chat

Note

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

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

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-2023-23917?

rocket.chat: upgrade to 5.2.0. Exact commands for each OS are on this page.

Is CVE-2023-23917 being exploited?

CVE-2023-23917 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-2023-23917 affect?

CVE-2023-23917 affects rocket.chat. Severity is high (CVSS 8.8). A prototype pollution vulnerability exists in Rocket.Chat server <5.2.0 that could allow an attacker to a RCE under the admin account. Any user can create their own server in your cloud and become an admin so this vulnerability could affect

How urgent is CVE-2023-23917?

Priority 46/100. High severity

Software pages

Rocket.Chat vulnerabilities

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References

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