---
cve: "CVE-2025-5263"
severity: "MEDIUM"
cvss: 4.3
epss: "0.2%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2025-05-27 13:15:22"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-02T13:44:11+02:00"
---

# CVE-2025-5263

> 4.3 MEDIUM

## Beschreibung

Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## BSI-Hinweise (deutsch)

- [Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2025-1850)
- [Mozilla Firefox und Thunderbird: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2025-1160)

## Referenzen

- <https://bugzilla.mozilla.org/show_bug.cgi?id=1960745>
- <https://www.mozilla.org/security/advisories/mfsa2025-42/>
- <https://www.mozilla.org/security/advisories/mfsa2025-43/>
- <https://www.mozilla.org/security/advisories/mfsa2025-44/>
- <https://www.mozilla.org/security/advisories/mfsa2025-45/>
- <https://www.mozilla.org/security/advisories/mfsa2025-46/>
- <https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html>
- <https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-5263) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_