CVE-2023-0736Public exploitNetwork attack vector

Stored XSS via unescaped shared-page username

Published Feb 7, 2023 · Updated Mar 25, 2025

Stored XSS in wallabag before 2.5.4 allows remote authenticated users to execute script in a viewer's browser through a crafted username. The public share-page Twig template passes entry.user.username into a translation rendered with raw output without escaping it. Exploitation requires an account and a victim to view a shared entry, allowing script execution in the victim's wallabag origin.

CVSS severity5.4
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in wallabag before 2.5.4 allows remote authenticated users to execute script in a viewer's browser through a crafted username. The public share-page Twig template passes entry.user.username into a translation rendered with raw output without escaping it. Exploitation requires an account and a victim to view a shared entry, allowing script execution in the victim's wallabag origin.

The record

CVE
CVE-2023-0736
Published
Feb 7, 2023
Updated
Mar 25, 2025
Vendor
wallabag
Product
wallabag
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <2.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

wallabag · wallabagversion=unspecified <2.5.4

Published CVSS scores

5.4NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.6Protect AI (formerly huntr.dev)CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A: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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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