Remote code execution via serialized-length corruption
Published Sep 12, 2026 · Updated Sep 12, 2026
PHP object injection in Themeum Tutor LMS 4.0.7 and earlier allows remote authenticated users to execute code through withdrawal settings. The tutor_save_withdraw_account AJAX handler serializes attacker-controlled field names after esc_sql() expands percent signs, then later unserialization reads beyond the corrupted length into an injected object stream. Subscriber-level access and monetization are required; open registration supplies the account path, and the bundled FileCookieJar gadget writes attacker-controlled server files.
Summary
What happened
PHP object injection in Themeum Tutor LMS 4.0.7 and earlier allows remote authenticated users to execute code through withdrawal settings. The tutor_save_withdraw_account AJAX handler serializes attacker-controlled field names after esc_sql() expands percent signs, then later unserialization reads beyond the corrupted length into an injected object stream. Subscriber-level access and monetization are required; open registration supplies the account path, and the bundled FileCookieJar gadget writes attacker-controlled server files.
The record
- CVE
- CVE-2026-78175
- Published
- Sep 12, 2026
- Updated
- Sep 12, 2026
- Vendor
- Themeum
- Product
- Tutor LMS
- Classifications
- T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 12, 2026CVE publishedPublication date reported by the CVE source.
- Sep 12, 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=0 <=4.0.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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
No public exploit references are available in this record.
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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