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MEDIUM severity

Cross-site scripting in jfinalGHSA-2c25-xfpq-8w9r

MEDIUM

GHSA-2c25-xfpq-8w9r is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in com.jfinal:jfinal. 1 public exploit reference exists, so weaponization risk is real. A fix is available for com.jfinal:jfinal — see the affected versions and patch details below.

Also known asCVE-2021-33348
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk
0.00%0.38%0.76%1.14%0.2%0.6%Apr 26Aug 26Oct 26

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

How urgent is this, really

GHSA-2c25-xfpq-8w9r by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
☕com.jfinal:jfinal

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

An issue was discovered in JFinal framework v4.9.10 and below. The "set" method of the "Controller" class of jfinal framework is not strictly filtered, which will lead to XSS vulnerabilities in some cases.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.jfinal:jfinalall versions4.9.11com.jfinal:jfinal:4.9.11

Affected Products

1 product · 1 configurations
Application
jfinaljfinal
≤ 4.9.10
range
Exploits & PoCs
1

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

An issue was discovered in JFinal framework v4.9.10 and below. The "set"…

github.comNVDJun 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update com.jfinal:jfinal to 4.9.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2c25-xfpq-8w9r is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

An issue was discovered in JFinal framework v4.9.10 and below. The "set" method of the "Controller" class of jfinal framework is not strictly filtered, which will lead to XSS vulnerabilities in some cases.
O3 Security · Impact-Aware SCA

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Cross-site scripting in jfinal (Medium 6.1)