CVE-2018-25089

Wiki-tab redirection via unisolated external links

Published Aug 28, 2023 · Updated Sep 30, 2024

Reverse tabnabbing in glb Meetup Tag Extension 0.1 allows remote authenticated users to redirect a wiki tab through a Meetup link. Meetup.class.php renders group and event anchors with target="_blank" but only rel="nofollow", leaving the originating tab reachable through window.opener. Control of a linked Meetup page and a visitor opening the generated link are required; the attacker can replace the original tab with a phishing page.

CVSS severity3.5
Low
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reverse tabnabbing in glb Meetup Tag Extension 0.1 allows remote authenticated users to redirect a wiki tab through a Meetup link. Meetup.class.php renders group and event anchors with target="_blank" but only rel="nofollow", leaving the originating tab reachable through window.opener. Control of a linked Meetup page and a visitor opening the generated link are required; the attacker can replace the original tab with a phishing page.

The record

CVE
CVE-2018-25089
Published
Aug 28, 2023
Updated
Sep 30, 2024
Vendor
glb
Product
Meetup Tag Extension
Classifications
CWE-1022
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

glb · Meetup Tag Extensionversion=0.1

Published CVSS scores

3.5VulDBCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.5VulDBCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
2.7VulDBAV:A/AC:L/Au:S/C:N/I:P/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1022Use of Web Link to Untrusted Target with window.opener Access

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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