What is CVE-2025-4951?

CVE-2025-4951 is a medium-severity vulnerability in Rapid7 Appspider Pro, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2025-05-20.

How severe is CVE-2025-4951?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Is CVE-2025-4951 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Rapid7 Appspider Pro

CVE-2025-4951

Editions of Rapid7 AppSpider Pro before version 7.5.018 is vulnerable to a stored cross-site scripting vulnerability in the "ScanName" field. Despite the application preventing the inclusion of special characters within the "ScanName" field, this could be bypassed by modifying the configuration file directly. This is fixed as of version 7.5.018

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (5.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Rapid7 Appspider Pro — versions Below 7.5.018
Rapid7 Appspider_pro

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@rapid7.com (Release Notes)

Frequently asked questions

What is CVE-2025-4951?: CVE-2025-4951 is a medium-severity vulnerability in Rapid7 Appspider Pro, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2025-05-20.
How severe is CVE-2025-4951?: Medium severity. CVSS v3 base score is 4.6 out of 10.
Is CVE-2025-4951 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.