Vulnerability · Published Jan 26, 2026 · Assigned by certcc
CVE-2025-57785Double free in XSLT in 'show_index'
Medium 6.5
In plain English
A medium-severity security flaw in Hiawatha Web server from Hiawatha. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 67.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A Double Free in XSLT `show_index` has been identified in Hiawatha webserver version 11.7 which allows an unauthenticated attacker to corrupt data which may lead to arbitrary code execution.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Hiawatha | Hiawatha Web server | 11.47 – through 10.8.2 |