Which products and versions are affected by CVE-2023-30591?

Affected: NodeBB. The full list is in the CVE brief.

Is CVE-2023-30591 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2023-30591 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2023-30591?

Public exploit code is available.

Is there a fix for CVE-2023-30591?

Fixed versions are available, including NodeBB <=2.8.10, NodeBB 2.8.10.

How urgently should CVE-2023-30591 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2023-30591

Q: What is CVE-2023-30591?

Denial-of-service in NodeBB <= v2.8.10 allows unauthenticated attackers to trigger a crash, when invoking eventName.startsWith() or eventName.toString(), while processing Socket.IO messages via crafted Socket.IO messages containing array or object type for the event name respectively.

Q: How urgently should CVE-2023-30591 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

HighPublic exploit

Denial-of-service in NodeBB <= v2.8.10 allows unauthenticated attackers to trigger a crash, when invoking eventName.startsWith() or eventName.toString(), while processing Socket.IO messages via crafted Socket.IO messages containing array or object type for the event name…

Published Sep 29, 2023 · Updated Aug 12, 2026

Key Facts

Patch immediately

CVE-2023-30591 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting NodeBB.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 59% probability of exploitation in the next 30 days.
Fixed versions are available, including NodeBB <=2.8.10, NodeBB 2.8.10.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS (30-day exploit likelihood)

59%

Higher than 99.0% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2023-30591 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
NodeBBNodebb	See advisory	2.8.10

Patched Releases

NodeBB

<=2.8.10

Timeline

Publicly disclosed
Sep 29, 2023
Last updated
Aug 12, 2026

Weakness Type

CWE-241 Improper Handling of Unexpected Data Type
CWE-754 Improper Check for Unusual or Exceptional Conditions

References

2 more references in the full CVE brief

FAQ

Common Questions.

Denial-of-service in NodeBB <= v2.8.10 allows unauthenticated attackers to trigger a crash, when invoking eventName.startsWith() or eventName.toString(), while processing Socket.IO messages via crafted Socket.IO messages containing array or object type for the event name respectively.
Affected: NodeBB. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including NodeBB <=2.8.10, NodeBB 2.8.10.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2023-30591 Running On Your Attack Surface?

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