WordPress User Registration plugin <= 5.3.0 - Broken Access Control vulnerability
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 12/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
The User Registration plugin for WordPress, made by ThemeGrill, has a missing authorization flaw that lets an attacker with a low-privilege account change data they should not be able to, such as access-control settings. The attack can be carried out remotely over the network, but the attacker must first log in with a basic account.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
Missing Authorization vulnerability in ThemeGrill User Registration user-registration allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects User Registration: from n/a through 5.3.0.
cve.now Index
- Exploitation0/40No signal
- Exposure3/25Reachable over the network · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity4.3/10CVSS 4.3
- No patch5/5No patch listed yet
What would change the score
- Would score about 67 if added to CISA KEV
- Would score about 62 if CISA's SSVC rates exploitation active
- Would score about 31 if advisories confirm default setups are exposed
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- user-registration
through 5.3.0
Evidence 1
- Link
Corrections
None so far.
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Questions about CVE-2026-120840
Is CVE-2026-120840 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-120840?
user-registration: through 5.3.0.Source: cve.now feed data