CVE-2026-82656Network attack vectorHinoki check available

File overwrite via unsanitized ZIP directory name

Published Aug 30, 2026 · Updated Aug 30, 2026

Path traversal in Admidio before 5.0.12 allows remote authenticated users to write outside an extraction directory via a crafted photo ZIP. The photo ZIP generator in modules/photos/photo_download.php uses the database-sourced album name verbatim as an archive directory while applying basename only to photo filenames. Exploitation requires album-creation rights, a recipient who extracts the archive, and an extractor that honors stored traversal paths; the write occurs on the recipient's system, not the server.

CVSS severity2.1
Low
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in Admidio before 5.0.12 allows remote authenticated users to write outside an extraction directory via a crafted photo ZIP. The photo ZIP generator in modules/photos/photo_download.php uses the database-sourced album name verbatim as an archive directory while applying basename only to photo filenames. Exploitation requires album-creation rights, a recipient who extracts the archive, and an extractor that honors stored traversal paths; the write occurs on the recipient's system, not the server.

The record

CVE
CVE-2026-82656
Published
Aug 30, 2026
Updated
Aug 30, 2026
Vendor
Admidio
Product
Admidio
Classifications
CWE-22, CWE-20, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 30, 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.

  1. Affected versionversion=0 <5.0.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Admidio · Admidioversion=0 <5.0.12

Published CVSS scores

2.6AdmidioCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
2.1VulnCheck CNACVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-20Improper Input Validation
T1204.002Malicious File

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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