How severe is CVE-2023-23917?

CVE-2023-23917 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-23917 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-23917?

CVE-2023-23917 affects Rocket.chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-23917?

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

When was CVE-2023-23917 published?

CVE-2023-23917 was published on 2023-02-23 and last updated on 2026-06-17.

CVE-2023-23917

CVE-2023-23917 is a high-severity vulnerability in Rocket.chat with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1321
Affected product: Rocket.chat
Published: 2023-02-23
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-23917?: 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.
How severe is CVE-2023-23917?: CVE-2023-23917 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-23917 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-23917?: CVE-2023-23917 affects Rocket.chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-23917?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-23917 published?: CVE-2023-23917 was published on 2023-02-23 and last updated on 2026-06-17.

References

https://hackerone.com/reports/1631258

Affected products (1)

cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*

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