WordPress Gallery Plugin: Files or Directories Accessible to External Parties
CVE-2023-3155 is a high-severity files or directories accessible to external parties vulnerability in WordPress Gallery Plugin, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version 3.39 as the first without the flaw, so updating WordPress Gallery Plugin to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.02% chance of exploitation within 30 days, higher than 64% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update WordPress Gallery Plugin to 3.39 or a later version.
- Update Nextgen Gallery to 3.39 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| WordPress Gallery Plugin | WordPress Gallery Plugin | before 3.39 | 3.39 |
| Imagely | Nextgen Gallery | before 3.39 | 3.39 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | NVD |
| CVSS 3.1 | 7.2 | High | CISA (ADP) |
Official description
The WordPress Gallery Plugin WordPress plugin before 3.39 is vulnerable to Arbitrary File Read and Delete due to a lack of input parameter validation in the `gallery_edit` function, allowing an attacker to access arbitrary resources on the server.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Files or Directories Accessible to External Parties
The product makes files or directories accessible to unauthorized actors, even though they should not be.
How developers prevent this class of flaw
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to disable public access.
More Files or Directories Accessible to External Parties vulnerabilities (CWE-552)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- wpscan.com/vulnerability/5c8473f4-4b52-430b-9140-b81b0a0901daExploit, Third Party Advisory
Recent Files or Directories Accessible to External Parties vulnerabilities
- 8.8 High severity
- 7.5 High severity
- 7.8 High severity
- 7.5 High severity
- 7.2 High severity
- 7.5 High severity
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