How severe is CVE-2019-1020005?

CVE-2019-1020005 has a CVSS score of 5.4/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2019-1020005?

CVE-2019-1020005 affects the following packages: invenio-communities (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2019-1020005?

Update invenio-communities to 1.0.0a20 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-1020005 is resolved across your whole dependency graph.

How do I detect CVE-2019-1020005 in my PyPI dependencies?

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

How do I mitigate CVE-2019-1020005 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-2019-1020005 actively exploited in the wild?

No public exploit code has been indexed for CVE-2019-1020005 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2019-1020005?

CVE-2019-1020005 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 53th 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-2019-1020005?

CVE-2019-1020005 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-2019-1020005 published, and has it been updated?

CVE-2019-1020005 was published on July 29, 2019 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.

🐍

🐍 PyPI

Not in CISA KEV

MEDIUM severity

CVE-2019-1020005 — invenio-communities

MEDIUMFix: inveniosoftware/invenio-communities@505da72

CVE-2019-1020005 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in invenio-communities. A fix is available for invenio-communities — see the affected versions and patch details below.

Cross-site Scripting in invenio-communities

Also known asGHSA-mfv8-q39f-mgfgPYSEC-2019-25

Published

Jul 29, 2019

Updated

Oct 20, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs53th percentile — riskier than 53% 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

🐍invenio-communities

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

Description

Cross-Site Scripting (XSS) vulnerability in Jinja templates

Impact

A Cross-Site Scripting (XSS) vulnerability was discovered in two Jinja templates in the Invenio-Communities module. The vulnerability allows a user to create a new community and include script element tags inside the description and page fields.

Patches

The problem has been patched in v1.0.0a20.

For more information

If you have any questions or comments about this advisory:

Email us at [email protected]

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`invenio-communities`	all versions	1.0.0a20`pip install --upgrade 'invenio-communities==1.0.0a20'`

Affected Products

1 product · 19 configurations

Application

invenio-communitiesinveniosoftware

1 version

1.0.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for invenio-communities, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update invenio-communities to 1.0.0a20 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-1020005 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

## Cross-Site Scripting (XSS) vulnerability in Jinja templates ### Impact A Cross-Site Scripting (XSS) vulnerability was discovered in two Jinja templates in the Invenio-Communities module. The vulnerability allows a user to create a new community and include script element tags inside the description and page fields. ### Patches The problem has been patched in v1.0.0a20. ### For more information If you have any questions or comments about this advisory: * Email us at [[email protected]](mailto:[email protected])

O3 Security · Impact-Aware SCA

Is CVE-2019-1020005 in your dependencies?

Find it across PyPI, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.4/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

invenio-communities

4.7/10

Code-Review4/10

Maintained10/10

Branch-ProtectionN/A

Assessed Oct 26, 2026

Timeline

Disclosed

Jul 29, 2019

Last updated

Oct 20, 2026

Identifiers

CVE-2019-1020005

GHSA-mfv8-q39f-mgfg

PYSEC-2019-25

References

Advisorygithub.com · GHSA mfv8 q39f mgfg Advisorynvd.nist.gov · CVE 2019 1020005 Advisorygithub.com · GHSA mfv8 q39f mgfg Webgithub.com · PYSEC 2019 25.yaml Packagegithub.com · 505da72c5acd7dfbd4148f884c73c9c3372b76f4

Related vulnerabilities

Also affects invenio-communities

This CVE is medium severity, in line with the other 1 CVE affecting invenio-communities.

GHSA-hjx6-f647-mvf9

Same weakness: CWE-79

This CVE is medium severity; 7 of 7 other CVEs with CWE-79 are rated as high or higher (top: critical).

CVE-2026-55649CVE-2026-113787CVE-2026-44267CVE-2026-96632CVE-2026-9086CVE-2026-118246CVE-2026-118251Browse all CWE-79

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026