Cyber Resilience

CVE-2020-13562

XSS in Phpgacl Project Phpgacl 3.3.7

Public PoCHigh EPSSXSS
Published
01 February 2021
Modified
21 November 2024
CVSS Score v3.1 6.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.78 99.5th percentile
Risk Priority 80 floored blend · peak EPSS

Summary

CVE-2020-13562 is a medium-severity Basic XSS (CWE-80) vulnerability in Phpgacl Project Phpgacl. Its CVSS base score is 6.1 (Medium).

Operationally, ranked in the top 0.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

A cross-site scripting vulnerability exists in the template functionality of phpGACL 3.3.7. A specially crafted HTTP request can lead to arbitrary JavaScript execution. An attacker can provide a crafted URL to trigger this vulnaerability in the phpGACL template action parameter.

CWE(s)
CWE-80CWE-79

Related Threats

Likely ATT&CK TechniquesAI

Techniques this vulnerability likely enables, inferred from its description, weakness type, and attributed-actor tradecraft. Confidence is per-technique.

T1189 Drive-by Compromise Initial Accessconfidence: HIGH
Cross-site scripting via a crafted URL directly enables drive-by compromise when a victim visits the malicious link.
attack.mitre.org →
T1059.007 JavaScript Executionconfidence: HIGH
Successful XSS leads to arbitrary JavaScript execution in the victim's browser.
attack.mitre.org →
T1185 Browser Session Hijacking Collectionconfidence: MEDIUM
Browser-based JavaScript execution can hijack authenticated sessions or capture session tokens.
attack.mitre.org →
inferred from description + CWE · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2020-13564Same product: Open-Emr Openemr
CVE-2020-13563Same product: Open-Emr Openemr
CVE-2023-22972Same product: Open-Emr Openemr
CVE-2023-2948Same product: Open-Emr Openemr
CVE-2022-2733Same product: Open-Emr Openemr
CVE-2023-2949Same product: Open-Emr Openemr
CVE-2023-2566Same product: Open-Emr Openemr
CVE-2023-2947Same product: Open-Emr Openemr
CVE-2020-13965Shared CWE-79, CWE-80
CVE-2018-19943Shared CWE-79, CWE-80

Affected Assets

phpgacl project
phpgacl
3.3.7
open-emr
openemr
5.0.2

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.1.2
  • V1.3.2
  • V1.2.1
  • V1.3.1

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require output encoding and input validation that prevent basic XSS.

PR.PS-02 partial match
prevents

Patching and EOL replacement can remediate known XSS instances in libraries or frameworks (partial) but do nothing to enforce input neutralization in application code (none).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
detects

Security testing in development catches unneutralized script tags before release.

A.5.6 Contact with special interest groups partial match
prevents

Knowledge exchange on emerging attack techniques and patches reduces the likelihood that cross-site scripting flaws remain unaddressed in deployed applications.

A.5.7 Threat intelligence partial match
prevents

Operational indicators of compromise for web-application attacks can be incorporated into WAF or input-filtering rules, lowering the likelihood that unsanitized data reaches the browser.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates input validation and output encoding that directly prevent basic XSS.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for neutralization of script-related HTML tags.

A.8.28 Secure coding partial match
prevents

Secure coding standards require proper escaping of <, >, & to block XSS.

References