CVE-2021-25267
CVE-2021-25267 is a medium-severity vulnerability in Sophos Firewall Firmware with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 6.8)
- CVSS v2: 8.5
- EPSS exploit prediction: 1% (63rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Sophos Firewall Firmware
- Published:
- Last modified:
Description
Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from admin to super-admin in Sophos Firewall older than version 19.0 GA.
Frequently asked questions
- What is CVE-2021-25267?
- Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from admin to super-admin in Sophos Firewall older than version 19.0 GA.
- How severe is CVE-2021-25267?
- CVE-2021-25267 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-25267 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-25267?
- CVE-2021-25267 affects Sophos Firewall Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-25267?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-25267 published?
- CVE-2021-25267 was published on 2022-05-05 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:sophos:firewall_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Sophos Firewall Firmware
- CVE-2025-7624 — Critical (CVSS 9.8): An SQL injection vulnerability in the legacy (transparent) SMTP proxy of Sophos Firewall versions older than 21.0 MR2…
- CVE-2025-6704 — Critical (CVSS 9.8): An arbitrary file writing vulnerability in the Secure PDF eXchange (SPX) feature of Sophos Firewall versions older than…
- CVE-2024-12728 — Critical (CVSS 9.8): A weak credentials vulnerability potentially allows privileged system access via SSH to Sophos Firewall older than…
- CVE-2024-12727 — Critical (CVSS 9.8): A pre-auth SQL injection vulnerability in the email protection feature of Sophos Firewall versions older than 21.0 MR1…
- CVE-2025-7382 — High (CVSS 8.8): A command injection vulnerability in WebAdmin of Sophos Firewall versions older than 21.0 MR2 (21.0.2) can lead to…
- CVE-2024-12729 — High (CVSS 8.8): A post-auth code injection vulnerability in the User Portal allows authenticated users to execute code remotely in…
All CVEs affecting Sophos Firewall Firmware →
Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities
- CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
- CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
- CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
- CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
- CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
- CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…
Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →