Unauthenticated service interruption via PHP object injection
Published Dec 18, 2025 · Updated Dec 18, 2025
Insecure deserialization in to3k Twittodon through its 2023-02-28 commit allows remote attackers to interrupt service via HTTP POST. download.php base64-decodes the obj parameter and passes the result directly to PHP unserialize(), then iterates over the attacker-selected object without validating its type. No authentication or user interaction is required; a crafted object reaches the public endpoint and triggers a fatal processing error that disrupts the request-serving application.
Summary
What happened
Insecure deserialization in to3k Twittodon through its 2023-02-28 commit allows remote attackers to interrupt service via HTTP POST. download.php base64-decodes the obj parameter and passes the result directly to PHP unserialize(), then iterates over the attacker-selected object without validating its type. No authentication or user interaction is required; a crafted object reaches the public endpoint and triggers a fatal processing error that disrupts the request-serving application.
The record
- CVE
- CVE-2025-63950
- Published
- Dec 18, 2025
- Updated
- Dec 18, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-502, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 18, 2025CVE publishedPublication date reported by the CVE source.
- Dec 18, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
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.
Weakness, pattern, technique
Public exploit references
- PHP object-injection denial-of-service proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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