CVE-2026-48823Public exploitNetwork attack vector

Stored XSS via unescaped tag autocomplete rendering

Published Jun 17, 2026 · Updated Jun 17, 2026

Stored XSS in Shaarli 0.16.1 and earlier allows remote authenticated users to execute JavaScript in other users' browsers via crafted bookmark tags. The tag-filter autocomplete inserts stored tag text into the DOM without output escaping, so HTML event handlers execute during matching. An account able to create a bookmark supplies the tag, and a victim must use the homepage's Filter by tag search; the script then runs with that victim's browser privileges.

CVSS severity4.8
Medium
EPSS probability0.11%
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 Shaarli 0.16.1 and earlier allows remote authenticated users to execute JavaScript in other users' browsers via crafted bookmark tags. The tag-filter autocomplete inserts stored tag text into the DOM without output escaping, so HTML event handlers execute during matching. An account able to create a bookmark supplies the tag, and a victim must use the homepage's Filter by tag search; the script then runs with that victim's browser privileges.

The record

CVE
CVE-2026-48823
Published
Jun 17, 2026
Updated
Jun 17, 2026
Vendor
Shaarli
Product
Shaarli
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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=< 0.16.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shaarli · Shaarliversion=< 0.16.2

Published CVSS scores

4.8GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/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.

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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')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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