CVE-2026-34098Public exploitNetwork attack vector

Authenticated script execution via unescaped id parameter

Published Jul 1, 2026 · Updated Jul 1, 2026

Reflected XSS in The Guardian Language System through commit e42c395 allows remote authenticated users to run script via a crafted URL. The media.php page inserts the id GET value without encoding into a video source URL and a form action attribute, allowing injected markup to enter the response. A logged-in victim must open the crafted URL, after which the script runs in that victim's browser session and can act with that session's privileges.

CVSS severity4.8
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in The Guardian Language System through commit e42c395 allows remote authenticated users to run script via a crafted URL. The media.php page inserts the id GET value without encoding into a video source URL and a form action attribute, allowing injected markup to enter the response. A logged-in victim must open the crafted URL, after which the script runs in that victim's browser session and can act with that session's privileges.

The record

CVE
CVE-2026-34098
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
The Guardian
Product
Language System
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 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 <=e42c395ec4b03fe62973a669c9209a673838b8a4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Guardian · Language Systemversion=0 <=e42c395ec4b03fe62973a669c9209a673838b8a4

Published CVSS scores

4.8VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
4.6VulnCheckCVSS:3.1/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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