CVE-2025-66421

Tryton sao (aka tryton-sao) before 7.6.11 allows XSS because it does not escape completion values. This is fixed in 7.6.11, 7.4.21, 7.0.40, and 6.0.69.

Published: 2025-11-29 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-66421 is rated Low Risk (22.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.14%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-66421

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.14% +0.12%
2 2026-04-28 0.05% 0.02% -0.03%
3 2026-04-01 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-66421

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.3 2.7 [email protected]

Weakness enumeration for CVE-2025-66421

GitHub Security Advisory for CVE-2025-66421

GHSA-6qj9-2g9m-29x9 · Severity: medium · Ecosystem: npm — Tryton sao allows XSS because it does not escape completion values

OS Trackers for CVE-2025-66421

vendor priority summary link
debian not yet assigned CVE-2025-66421 not yet assigned priority: Debian including 1 source packages (tryton-sao), 4 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2025-66421
ubuntu medium CVE-2025-66421 medium priority: Ubuntu including 1 source packages (tryton-sao), 5 status rows across 5 suites (jammy, noble, plucky, questing, upstream): needs-triage 2, DNE 1, ignored 1, released 1. https://ubuntu.com/security/CVE-2025-66421

Affected software / configurations for CVE-2025-66421

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-66421

cvelogic Threat Intelligence