CVE-2018-12540

High severity vulnerability that affects io.vertx:vertx-web

8.8 HighPublic exploitFix available

In version from 3.0.0 to 3.5.2 of Eclipse Vert.x, the CSRFHandler do not assert that the XSRF Cookie matches the returned XSRF header/form parameter. This allows replay attacks with previously issued tokens which are not expired yet.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.99%Down 4.2 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

Record: CVE-2018-12540
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-352
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-12540
Weakness: CWE-352
Updated: 2026-11-02

EUVDEUVD-2018-0690 No score

Record: EUVD-2018-0690
Updated: 2026-11-03

GitHub AdvisoriesGHSA-rvgg-f8qm-6h7j No score

High severity vulnerability that affects io.vertx:vertx-web

Record: GHSA-rvgg-f8qm-6h7j
Weakness: CWE-352
Updated: 2026-11-02

OSV 8.8

Record: CVE-2018-12540
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-rvgg-f8qm-6h7j No score

High severity vulnerability that affects io.vertx:vertx-web

Record: GHSA-rvgg-f8qm-6h7j
Weakness: CWE-352
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`io.vertx:vertx-web` Maven	3.0.0 up to 3.5.3	3.5.3
`io.vertx:vertx-web` Maven	3.0.0 up to 3.5.3, plus listed versions 3.1.03.2.03.2.13.3.03.3.0.CR1 Show 16 moreShow less 3.3.0.CR23.3.13.3.23.3.33.4.03.4.0.Beta13.4.13.4.23.5.03.5.0.Beta13.5.13.5.23.5.2.CR13.5.2.CR23.5.2.CR33.5.3.CR1	3.5.3

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	bernard-wagner/vertx-web-xsrf	2018-06-15
PoC in GitHub	tafamace/CVE-2018-12540	2018-11-19

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-12540 is a high vulnerability (CVSS 8.8) in Eclipse Vert.x, published July 12, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.99%, the 80th percentile. Fixed in io.vertx:vertx-web 3.5.3.

References

Show 9 moreShow less