CVE-2018-12540

mediumpriority · attend · 46EPSS 0.020 · 81 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

1.99% (81st) EPSS

CVSS 6.8 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.08.8highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.08.3highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-352USprimaryCWE-352US

exploits (2)

Public proof-of-concept and weaponised exploit code.

bernard-wagner/vertx-web-xsrfVert.X CSRF Proof of Concept (CVE-2018-12540)PoC · poc_in_github
tafamace/CVE-2018-12540tafamace/CVE-2018-12540PoC · poc_in_github

affected products (4)

Products and version ranges known to be affected.

The Eclipse Foundation Eclipse Vert.x≤ unspecified ≤3.5.2enisa_euvdEU
The Eclipse Foundation Eclipse Vert.x3.0 → unspecifiedenisa_euvdEU
eclipse vert.x3.0.0 → 3.5.2nvdUScpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*
Maven io.vertx:vertx-web3.0.0 → 3.5.3osvUSpkg:maven/io.vertx/vertx-web

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-rvgg-f8qm-6h7jHigh severity vulnerability that affects io.vertx:vertx-web2018-10-17ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2018-07-12modified 2026-06-17

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+10356 more

references (18)

External citations — patches, advisories, analysis.

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