CVE-2021-25791 — CVE & Security Advisory Radar

🎯 CVE-2021-25791 LOW 3.1 🔥 EPSS 2.5% 🧪 PoC 🇪🇺 EUVD

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CVE-2021-25791 | Multiple stored cross site scripting (XSS) vulnerabilities in the "Update Profile" module of Online Doctor Appointment System 1.0 allows authenticated attackers to execute arbitrary web scripts or HTML via crafted payloads in the First Name, Last Name, and Address text fields.

Multiple stored cross site scripting (XSS) vulnerabilities in the "Update Profile" module of Online Doctor Appointment System 1.0 allows authenticated attackers to execute arbitrary web scripts or HTML via crafted payloads in the First Name, Last Name, and Address text fields.

Klassifikation & Betroffenheit:

n/a n/a n/a

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') 🎯 High

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

🛡️ Empfohlene Mitigation: Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482]. Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and …

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-63 · Cross-Site Scripting (XSS) (Very High) CAPEC-85 · AJAX Footprinting (Low) CAPEC-209 · XSS Using MIME Type Mismatch (Medium) CAPEC-588 · DOM-Based XSS (Very High) CAPEC-591 · Reflected XSS (Very High) CAPEC-592 · Stored XSS (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2025-59320 4.6 CVE-2026-35502 4.6 CVE-2026-20765 4.6 CVE-2026-20763 4.6 CVE-2026-67673 4.6

🧪 Exploit-Evidenz: EDB-49396 · Online Doctor Appointment System 1.0 - 'Multiple' Stored XSS

🐙 MrCraniums/CVE-2021-25791-Multip

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2021

Veröffentlicht 07/2021

Heute 11.09.

Veröffentlicht:23.07.2021

Aktualisiert:03.08.2024 20:11

Assigner (CNA):mitre

EUVD-ID:EUVD-2021-12674

CWE-79: Cross-Site Scripting ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-08-29	2026-09-06
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

Datenquellen & Methodik: Primärquelle ist die EUVD der ENISA (laufender Datenbank-Sync, alle 15 Minuten), abgeglichen mit dem CISA-KEV-Katalog und der NVD — Detail-Dossiers reichern fehlende Felder live per NVD an — mit Fallback auf CIRCL vulnerability-lookup (EU/Non-Profit, aggregiert CVE-, GitHub- und OSV-Advisories). Der CISA-KEV-Katalog (Known Exploited Vulnerabilities, ~1.700 aktiv ausgenutzte Schwachstellen) wird bei jedem Sync vollständig neu geladen und kreuzreferenziert — filterbar über die KEV-Pille. CVSS 3.1 wird nach Ampel-Logik aus Verteidigersicht dekodiert; EPSS bezeichnet die 30-Tage-Exploit-Wahrscheinlichkeit (FIRST.org).

🇪🇺 ENISA EUVD 🇺🇸 NVD ⚠️ CISA KEV ⚡ EPSS

3.1 LOW

🇪🇺 EUVD

EPSS

2.5%

CVE-2021-25791 🌐 Netzwerk (Remote) 🔑 Geringe Nutzerrechte nötig

🧪 n/a

CVE-2021-25791 | Multiple stored cross site scripting (XSS) vulnerabilities in the "Update Profile" module of Online Doctor Appointment System 1.0 allows authenticated attackers to execute arbitrary web scripts or HTML via crafted payloads in the First Name, Last Name, and Address text fields.

CWE-79: Cross-Site Scripting ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

23.07.2021

🛡️ Details ➔

CVE-2021-25791 | Multiple stored cross site scripting (XSS) vulnerabilities in the "Update Profile" module of Online Doctor Appointment System 1.0 allows authenticated attackers to execute arbitrary web scripts or HTML via crafted payloads in the First Name, Last Name, and Address text fields.

Zero-Day & Vulnerability Intelligence Hub

CVE-2021-25791 | Multiple stored cross site scripting (XSS) vulnerabilities in the "Update Profile" module of Online Doctor Appointment System 1.0 allows authenticated attackers to execute arbitrary web scripts or HTML via crafted payloads in the First Name, Last Name, and Address text fields.