Unauthenticated account enumeration via divergent reset responses
Published Feb 24, 2026 · Updated Feb 24, 2026
Observable response discrepancy in Piwigo 15.5.0 allows remote attackers to identify valid accounts through password reset requests. The POST handler at password.php?action=lost returns an invalid-account message for unknown identifiers but distinct success or error text for registered usernames and email addresses. No authentication or user interaction is required; the disclosed identifiers support targeted password guessing or phishing without exposing passwords or altering accounts.
Summary
What happened
Observable response discrepancy in Piwigo 15.5.0 allows remote attackers to identify valid accounts through password reset requests. The POST handler at password.php?action=lost returns an invalid-account message for unknown identifiers but distinct success or error text for registered usernames and email addresses. No authentication or user interaction is required; the disclosed identifiers support targeted password guessing or phishing without exposing passwords or altering accounts.
The record
- CVE
- CVE-2025-62512
- Published
- Feb 24, 2026
- Updated
- Feb 24, 2026
- Vendor
- Piwigo
- Product
- Piwigo
- Classifications
- CWE-204, T1087
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 24, 2026CVE publishedPublication date reported by the CVE source.
- Feb 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion== 15.5.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- GHSA-h4wx-7m83-xfxc password-reset enumeration PoCproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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