CVE-2018-25065Public exploitNetwork attack vector

Script execution via unescaped parser tag output

Published Jan 5, 2023 · Updated Apr 10, 2025

Cross-site scripting in Wikimedia Foundation I18nTags before 2018-08-06 allows remote attackers to execute script via parser tag input. The formatnum, grammar, plural, and linktrail hooks returned attacker-controlled tag results as HTML without reparsing and escaping them as wikitext. No account is required to submit crafted tags through a parsing interface, but another user must render the output for cross-user script execution.

CVSS severity3.5
Low
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Wikimedia Foundation I18nTags before 2018-08-06 allows remote attackers to execute script via parser tag input. The formatnum, grammar, plural, and linktrail hooks returned attacker-controlled tag results as HTML without reparsing and escaping them as wikitext. No account is required to submit crafted tags through a parsing interface, but another user must render the output for cross-user script execution.

The record

CVE
CVE-2018-25065
Published
Jan 5, 2023
Updated
Apr 10, 2025
Vendor
Wikimedia Foundation
Product
I18nTags
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2025Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wikimedia Foundation · I18nTagsversion=n/a

Published CVSS scores

4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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
Privilegesunauthenticated
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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