CVE-2026-67351 (GCVE-0-2026-67351)
Vulnerability from cvelistv5 – Published: 2026-07-30 13:57 – Updated: 2026-07-30 13:57 X_Open Source
VLAI
EPSS
VEX
Title
Serendipity < 2.6.1 Authentication Bypass via Username Collision
Summary
Serendipity before 2.6.1 contains an authentication context confusion vulnerability where password validation and session loading operate independently without ensuring both use the same user record. An authenticated Editor can create a username collision with an Administrator account and obtain administrative privileges by logging in with their own password while the session loads the Administrator's account data.
Severity
CWE
- CWE-304 - Missing Critical Step in Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/s9y/Serendipity/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/serendipity-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| s9y | Serendipity |
Affected:
0 , < 2.6.1
(semver)
Unaffected: 2.6.1 (semver) |
Date Public
2026-07-27 00:00
Credits
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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