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MEDIUM severity

CVE-2020-20523 — gila

MEDIUM

CVE-2020-20523 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in gilacms/gila. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for gilacms/gila — see the affected versions and patch details below.

Gila CMS Cross-site Scripting Vulnerability

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 25, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2020-20523.

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.00%0.39%0.79%1.18%0.3%0.7%Apr 26Aug 26Oct 26

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
🐘gilacms/gila

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

Description

Cross Site Scripting (XSS) vulnerability in adm_user parameter in Gila CMS version 1.11.3, allows remote attackers to execute arbitrary code during the Gila CMS installation.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistgilacms/gilaall versions1.11.4composer require gilacms/gila:^1.11.4

Affected Products

1 product · 1 configurations
Application
gila cmsgilacms
1 version
1.11.3
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.

Cross Site Scripting (XSS) vulnerability in adm_user parameter in Gila C…

github.comNVDAug 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update gilacms/gila to 1.11.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-20523 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

Cross Site Scripting (XSS) vulnerability in `adm_user` parameter in Gila CMS version 1.11.3, allows remote attackers to execute arbitrary code during the Gila CMS installation.
O3 Security · Impact-Aware SCA

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CVE-2020-20523: gila RCE — Fixed in 1.11.4