How severe is CVE-2020-29204?

CVE-2020-29204 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2020-29204?

CVE-2020-29204 affects the following packages: com.xuxueli:xxl-job-core (Maven). Ecosystems affected: Maven.

How do I fix CVE-2020-29204?

Update com.xuxueli:xxl-job-core to 2.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-29204 is resolved across your whole dependency graph.

How do I detect CVE-2020-29204 in my Maven dependencies?

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

How do I mitigate CVE-2020-29204 if there is no patch (or I can't update yet)?

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.

Is CVE-2020-29204 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2020-29204, including 1 in-the-wild exploitation 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 CVE-2020-29204?

CVE-2020-29204 has an EPSS (Exploit Prediction Scoring System) score of 0.9%, placing it in the 60th 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 CVE-2020-29204?

CVE-2020-29204 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2020-29204 published, and has it been updated?

CVE-2020-29204 was published on December 27, 2020 and was last updated on October 20, 2026. 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

MEDIUM severity

CVE-2020-29204 — xxl-job-core

MEDIUMFix: xuxueli/xxl-job@2276285

CVE-2020-29204 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in com.xuxueli:xxl-job-core. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for com.xuxueli:xxl-job-core — see the affected versions and patch details below.

Cross-site Scripting in XXL-JOB

Also known asGHSA-wc73-w5r9-x9pc

Published

Dec 27, 2020

Updated

Oct 20, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.9%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs60th percentile — riskier than 60% of all scored CVEsHighest risk

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

☕com.xuxueli:xxl-job-core

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

XXL-JOB 2.2.0 allows Stored XSS (in Add User) to bypass the 20-character limit via xxl-job-admin/src/main/java/com/xxl/job/admin/controller/UserController.java.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`com.xuxueli:xxl-job-core`	all versions	2.3.0`com.xuxueli:xxl-job-core:2.3.0`

Affected Products

1 product · 1 configurations

Application

xxl-jobxuxueli

1 version

2.2.0

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.

XXL-JOB 2.2.0 allows Stored XSS (in Add User) to bypass the 20-character…

github.comNVDDec 2020

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.xuxueli:xxl-job-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.xuxueli:xxl-job-core to 2.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-29204 is resolved across your whole dependency graph.
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

XXL-JOB 2.2.0 allows Stored XSS (in Add User) to bypass the 20-character limit via xxl-job-admin/src/main/java/com/xxl/job/admin/controller/UserController.java.

O3 Security · Impact-Aware SCA

Is CVE-2020-29204 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template or Metasploit module yet. 1 public proof-of-concept reference is listed on this page.

OpenSSF Scorecard

Package health score

xxl-job

3.8/10

Code-Review0/10

Maintained10/10

Branch-Protection0/10

Assessed Nov 2, 2026

Timeline

Disclosed

Dec 27, 2020

First exploit

Dec 29, 2020

3 days after disclosure — rapid exploitation

Last updated

Oct 20, 2026

Identifiers

CVE-2020-29204

GHSA-wc73-w5r9-x9pc

References

Advisorynvd.nist.gov · CVE 2020 29204 Webgithub.com · 227628567354d3c156951009d683c6fec3006e0e Packagegithub.com · xxl job Evidencegithub.com

Related vulnerabilities

Also affects xxl-job-core

This CVE is medium severity; 3 of 5 other CVEs affecting xxl-job-core are rated as high or higher (top: critical).

CVE-2025-7787CVE-2024-42681CVE-2024-3366CVE-2022-43183CVE-2022-40929

Same weakness: CWE-79

This CVE is medium severity; 3 of 3 other CVEs with CWE-79 are rated as high or higher (top: critical).

CVE-2026-55649CVE-2026-113787CVE-2026-44267Browse all CWE-79

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026