Post Duplicator < 3.0.18 - Admin+ Arbitrary Option Update via Unvalidated Option Name
- Exploited
- No known exploitation
- Fix
- Fixed in 3.0.18
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 3.0.18.
- Last modified
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.13% · 2nd percentile
- 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? →
- 11/100 · 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: total
Summary
The Post Duplicator WordPress plugin, before version 3.0.18, does not limit settings saves to its own options. A site administrator on a multisite network who is not a Super Admin can overwrite arbitrary options on their site, including role definitions, and so grant themselves network-management capabilities.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
The Post Duplicator WordPress plugin before 3.0.18 does not restrict settings saves to its own options, allowing a site administrator on a multisite network who is not a Super Admin to overwrite arbitrary options of their site, including the role definitions, and so grant themselves network-management capabilities.
cve.now Index
- Exploitation0/40No signal
- Exposure3/25Reachable over the network · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.2/10CVSS 7.2, total technical impact per CISA
- No patch0/5No signal
What would change the score
- Would score about 66 if added to CISA KEV
- Would score about 61 if CISA's SSVC rates exploitation active
- Would score about 30 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 3.0.18.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Unknown Post Duplicator
fixed in 3.0.18
Evidence 1
- Exploit
Corrections
None so far.
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Questions about CVE-2026-121874
Is CVE-2026-121874 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-2026-121874?
Post Duplicator: before 3.0.18.Source: cve.now feed data
How do I fix CVE-2026-121874?
Upgrade to a fixed version: 3.0.18.Source: cve.now feed data