CVE-2018-12541

Q: How do I fix CVE-2018-12541?

Upgrade vert.x to 3.5.4 or later.

Q: Is CVE-2018-12541 being actively exploited?

Not that we know of. CVE-2018-12541 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.

Q: How severe is CVE-2018-12541?

CVE-2018-12541 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2018-12541 affect?

Published advisories record a fix for vert.x (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUMEPSS 84th pctl

6.5

CVSS v3

NVD

Description

In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed.

CWE-789 CWE-119Buffer Overflow

How to fix

Remediation Available

vert.xNVD

Affected:>= 3.0.0, < 3.5.4Fixed in:3.5.4CVE-2018-12541derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.65%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Vendor Advisory1

bugs.eclipse.org

Third-Party Advisory2

Other references13

Related Vulnerabilities

Other CWE-789 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-30522	High	7.5	90%	-	Fix
CVE-2026-49975	High	7.5	28%	-	Fix
CVE-2025-27533	High	7.5	8.6%	-	Fix
CVE-2017-7651	High	7.5	5.3%	-	Fix
CVE-2021-31811	Medium	5.5	3.4%	-	-
CVE-2021-27906	Medium	5.5	3.3%	-	Fix

Common questions

How do I fix CVE-2018-12541?

Upgrade vert.x to 3.5.4 or later.

Is CVE-2018-12541 being actively exploited?

Not that we know of. CVE-2018-12541 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.

How severe is CVE-2018-12541?

CVE-2018-12541 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-12541 affect?

Published advisories record a fix for vert.x (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.