How severe is GHSA-rvgg-f8qm-6h7j?

No CVSS score has been assigned to GHSA-rvgg-f8qm-6h7j yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-rvgg-f8qm-6h7j?

GHSA-rvgg-f8qm-6h7j affects the following packages: io.vertx:vertx-web (Maven). Ecosystems affected: Maven.

How do I fix GHSA-rvgg-f8qm-6h7j?

Update io.vertx:vertx-web to 3.5.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-rvgg-f8qm-6h7j is resolved across your whole dependency graph.

How do I detect GHSA-rvgg-f8qm-6h7j in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.vertx:vertx-web, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-rvgg-f8qm-6h7j if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-rvgg-f8qm-6h7j actively exploited in the wild?

Yes. There are 2 known exploit references for GHSA-rvgg-f8qm-6h7j, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-rvgg-f8qm-6h7j?

GHSA-rvgg-f8qm-6h7j has an EPSS (Exploit Prediction Scoring System) score of 2.0%, placing it in the 81th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-rvgg-f8qm-6h7j?

GHSA-rvgg-f8qm-6h7j is classified as Cross-Site Request Forgery (CSRF) (CWE-352). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-rvgg-f8qm-6h7j published, and has it been updated?

GHSA-rvgg-f8qm-6h7j was published on October 17, 2018 and was last updated on December 3, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

High severity vulnerability that affects io.vertx:vertx-webGHSA-rvgg-f8qm-6h7j

Fix: vert-x3/vertx-web@f42b193

GHSA-rvgg-f8qm-6h7j is a Cross-Site Request Forgery (CSRF) vulnerability in io.vertx:vertx-web. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for io.vertx:vertx-web — see the affected versions and patch details below.

Also known asCVE-2018-12540

Published

Oct 17, 2018

Updated

Dec 3, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

2 known

Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

2.0%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs81th percentile — riskier than 81% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

☕io.vertx:vertx-web

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`io.vertx:vertx-web`	≥ 3.0.0&&< 3.5.3	3.5.3`io.vertx:vertx-web:3.5.3`

Affected Products

1 product · 1 configurations

Application

vert.xeclipse

≥ 3.0.0 && ≤ 3.5.2

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

In version from 3.0.0 to 3.5.2 of Eclipse Vert.x, the CSRFHandler do not…

bugs.eclipse.orgNVDSep 2020

Report on access.redhat.com

access.redhat.comNVDSep 2020

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.vertx:vertx-web, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update io.vertx:vertx-web to 3.5.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-rvgg-f8qm-6h7j is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
Text-Only RHOAR	`vertx-web`	RHSA-2018:2371

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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