4.3

CVE-2025-9891: cyberlord92 user sync Cross-Site Request Forgery (CSRF)

CVSS: 4.3v3.1MediumDeferred
Published 17-09-2025Last modified 08-04-2026
Open JSON

Vulnerability summary

CVE-2025-9891 is a medium (CVSS 4.3) Cross-Site Request Forgery (CSRF) vulnerability in cyberlord92 user sync. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.2% of scored vulnerabilities. Fixed in 1.0.3.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 17-09-2025
    PublishedVulnerability first disclosed.
  2. 08-04-2026
    Last modifiedVulnerability information updated.

Description

The User Sync – Remote User Sync plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.2. This is due to missing or incorrect nonce validation on the mo_user_sync_form_handler() function. This makes it possible for unauthenticated attackers to deactivate the plugin via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cyberlord921 product
Wordpress1 product
  • user-sync≤ 1.0.2 (fixed in 1.0.3)

2 vendors · 2 products

References

4 links