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🛡️ CVE-2023-0609 — wallabag

🟡 CVSS 4.3 — Medium ⚠️ Exploit Public CWE-285 NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

wallabag contains Improper Authorization via export feature

# Description

The export feature lets a user export a single entry or a set of entries in a given format (_e.g. PDF, MOBI, TXT_).

For example, https://yourinstance.wallabag.org/export/45.pdf will export the entry with id 45 in PDF format.

Since wallabag 2.0.0-alpha.1, this feature is vulnerable to an insecure direct object reference attack. A logged user can export any single entry without ownership validation.

This is due to a lack of access validation in the downloadEntryAction method.

You should immediately patch your instance to version 2.5.3 or higher if you have more than one user and/or having open registration.

# Resolution

A user check is now done in the vulnerable method before sending the exported entry.

The Entry retrieval through a ParamConverter has also been replaced with a call to the EntryRepository in order to prevent any information disclosure through response discrepancy.

# Workaround

If you are unable to update to the latest version or if you want to temporarily limit risk of exploitation, you may consider blocking requests to the endpoint /export/*.

E.g. with nginx:

``` nginx

location /export {

deny all;

}

```

# Credits

We would like to thank @bAuh0lz for reporting this issue through huntr.dev.

Reference: https://www.huntr.dev/bounties/3adef66f-fc86-4e6d-a540-2ffa59342ff0/

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2023-0609 is classified as CWE-285: Improper Authorization. A request is carried out without confirming that the caller is permitted to perform it on that specific resource.

Affected software

CVE-2023-0609 is recorded against 2 packages.

  • wallabag (fixed in 2.5.3)
  • wallabag/wallabag (from 2.0.0-alpha.1 up to 2.5.3)

Timeline and source

Published on 1 February 2023 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
huntr.dev
github.com
huntr.dev

Other advisories for this package

wallabag has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-285: Improper Authorization) in other software:

Details

Severity MEDIUM
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE CWE-285
Public Exploit ⚠️ Yes
Source NVD
Published 2023-02-01
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
wallabag — 2.5.3
wallabag/wallabag 2.0.0-alpha.1 2.5.3

Similar Threats

Exploit Protection

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CVE-2023-0609 carries CVSS 4.3 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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