Is CVE-2025-55127 in the CISA KEV catalog?

No. CVE-2025-55127 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-55127?

CVE-2025-55127 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2025-55127?

CVE-2025-55127 has an EPSS score of 0.21% (12th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-55127?

Upgrade revive adserver to 6.0.3 or later.

CVE & CISA-KEV Catalog

CVE-2025-55127

MEDIUM

5.4

CVSS v3

NVD

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.

CWE-156

How to fix

Remediation Available

revive adserverNVD

Affected:>= 6.0.0, < 6.0.3Fixed in:6.0.3CVE-2025-55127derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Exploit Intelligence

0.21%probability of exploitation in 30 days

12thpercentile

Low risk: more likely to be exploited than 12% of all known CVEs.

References

Exploit1

hackerone.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-14.