Vulnerability · Published Nov 20, 2025 · Assigned by hackerone
CVE-2025-55127
Medium 5.4
In plain English
A medium-severity security flaw in Revive Adserver from Revive. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 83.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
HackerOne community member Dao Hoang Anh (yoyomiski) has reported an improper neutralization of whitespace in the username when adding new users. A username with leading or trailing whitespace could be virtually indistinguishable from its legitimate counterpart when the username is displayed in the UI, potentially leading to confusion.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Revive | Revive Adserver | 6 – through 6.0.2 |
Weakness: CWE-156 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N