CVE-2025-52277Public exploitNetwork attack vector

Session hijacking via unsanitized robots metadata

Published Sep 9, 2025 · Updated Jul 5, 2026

Stored cross-site scripting in YesWiki 4.5.4 and earlier allows remote authenticated users to execute scripts in visitors' browsers. The meta robots configuration field accepts unsanitized input and emits it directly into a meta tag rendered on every page. Exploitation requires permission to edit meta tags and a victim to visit any wiki page, exposing visitor sessions and enabling actions in the victim's browser.

CVSS severity6.1
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in YesWiki 4.5.4 and earlier allows remote authenticated users to execute scripts in visitors' browsers. The meta robots configuration field accepts unsanitized input and emits it directly into a meta tag rendered on every page. Exploitation requires permission to edit meta tags and a victim to visit any wiki page, exposing visitor sessions and enabling actions in the victim's browser.

The record

CVE
CVE-2025-52277
Published
Sep 9, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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.

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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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