CVE-2020-23814 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in com.xuxueli:xxl-job. 2 public exploit references exist, so weaponization risk is real. A fix is available for com.xuxueli:xxl-job — see the affected versions and patch details below.
xxl-job Multiple cross-site scripting (XSS) vulnerabilities
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2020-23814 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
com.xuxueli:xxl-jobReal-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
Multiple cross-site scripting (XSS) vulnerabilities in xxl-job v2.2.0 allow remote attackers to inject arbitrary web script or HTML via (1) AppName and (2)AddressList parameter in JobGroupController.java file.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.xuxueli:xxl-job | all versions | 2.3.0com.xuxueli:xxl-job:2.3.0 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.xuxueli:xxl-job, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.xuxueli:xxl-job to 2.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-23814 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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2020-23814 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2020-23814. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
How to detect CVE-2020-23814
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2020-23814 -u https://target- Template
- XXL-JOB v2.2.0 — Stored Cross Site Scripting
- Severity
- medium
- Impact
- Authenticated attackers can inject malicious JavaScript through the AppName and AddressList parameters, potentially stealing admin session cookies or performing administrative actions on behalf of authenticated users.
- Remediation
- Upgrade to XXL-JOB version 2.2.1 or later.
Template by ProjectDiscovery nuclei-templates (Sourabh-Sahu), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2020-23814 in your dependencies?
O3 Security finds CVE-2020-23814 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.