CVE-2025-55573: QuantumNous new-api · Cross-site Scripting
Source CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Given the absence of an official patch, European organizations should implement immediate compensating controls. These include: 1) Employing strict input validation and output encoding on all user-supplied data within the QuantumNous new-api environment to prevent script injection. 2) Utilizing Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 3) Conducting thorough security testing and code reviews focusing on injection points in the API. 4) Educating users and employees about the risks of clicking on suspicious links or interacting with untrusted content to reduce successful exploitation via social engineering. 5) Monitoring web traffic and application logs for unusual activity indicative of exploitation attempts. 6) Considering temporary disabling or restricting access to vulnerable API endpoints if feasible until a patch is released. 7) Staying updated with vendor advisories and applying patches promptly once available. These measures, combined, can significantly reduce the risk posed by this vulnerability.
Description
QuantumNous new-api v.0.8.5.2 is vulnerable to Cross Site Scripting (XSS).