Unauthenticated file disclosure via attachment path traversal
Published Jul 21, 2026 · Updated Jul 21, 2026
Path traversal in Bit Apps Bit Form before 3.1.0 allows remote attackers to read arbitrary server files through form submission. The mail-notification workflow accepts a submitted file-field value as an attachment path and reads that path without confining it to the upload directory. Exploitation requires a non-default form with a file-upload field and a notification or autoresponder that sends the chosen attachment to an attacker-controlled address.
Summary
What happened
Path traversal in Bit Apps Bit Form before 3.1.0 allows remote attackers to read arbitrary server files through form submission. The mail-notification workflow accepts a submitted file-field value as an attachment path and reads that path without confining it to the upload directory. Exploitation requires a non-default form with a file-upload field and a notification or autoresponder that sends the chosen attachment to an attacker-controlled address.
The record
- CVE
- CVE-2026-13693
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Vendor
- Bit Apps
- Product
- Bit Form
- Classifications
- CWE-22, CAPEC-126, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 21, 2026CVE publishedPublication date reported by the CVE source.
- Jul 21, 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 <3.1.0
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.
Weakness, pattern, technique
Public exploit references
- WPScan form-attachment path traversal proof of conceptproof of concept · validated
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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