CVE-2025-13737Network attack vector

Social-login unlinking via missing nonce validation

Published Nov 28, 2025 · Updated Apr 8, 2026

CSRF in Nextendweb Nextend Social Login 3.1.21 and earlier allows remote attackers to unlink a user's social login. The unlinkUser function accepts the account-unlinking request without correctly validating a WordPress nonce that proves request intent. Exploitation requires a signed-in site administrator to follow an attacker-controlled link, severing the affected user's social-login association without changing other account data.

CVSS severity4.3
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Nextendweb Nextend Social Login 3.1.21 and earlier allows remote attackers to unlink a user's social login. The unlinkUser function accepts the account-unlinking request without correctly validating a WordPress nonce that proves request intent. Exploitation requires a signed-in site administrator to follow an attacker-controlled link, severing the affected user's social-login association without changing other account data.

The record

CVE
CVE-2025-13737
Published
Nov 28, 2025
Updated
Apr 8, 2026
Vendor
Nextendweb
Product
Nextend Social Login
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=3.1.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nextendweb · Nextend Social Loginversion=0 <=3.1.21

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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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