Information Disclosure in extension "Mail" (mail)
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 4.2.0, 3.12.5
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 4.2.0, 3.12.5.
- Exploitation0/40No signal
- Exposure20/25No login or user action needed per the CVSS vector, CISA rates it automatable · Data gap: No advisory context yet
- Reach10/20Affects Packagist packages
- Severity6.9/10CVSS 6.9
- No patch0/5No signal
What would change the score
- Would score about 82 if added to CISA KEV
- Would score about 77 if CISA's SSVC rates exploitation active
- Would score about 42 if advisories confirm default setups are exposed
CVE-2026-120328 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects Extension "Mail"; fixed in 4.2.0 and 3.12.5.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.56% · 46th 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? →
- 37/100 · provisional
- Fix
- Fixed in 4.2.0, 3.12.5
- 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: yes
- Technical impact: partial
Summary
The "Mail" extension for the software is affected, and it can allow unauthenticated attackers to access personal data of newsletter recipients. This happens because the click tracking feature fails to properly check the authentication code when it is left out, and recipient data is included in links within sent emails.
Read the original description
The click tracking middleware does not validate the authentication code of a recipient if the code is omitted. Unauthenticated attackers can retrieve personal data of newsletter recipients, which is inserted into links of sent mails.
What to do
Upgrade to a fixed version: 4.2.0, 3.12.5.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- mediaessenz/mailPackagist
From 4.0.0 · fixed in 4.2.0; fixed in 3.12.5
Evidence 1
- Advisory
Corrections
None so far.
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Questions about CVE-2026-120328
Is CVE-2026-120328 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-2026-120328?
mediaessenz/mail (Packagist): from 4.0.0 before 4.2.0; before 3.12.5.Source: cve.now feed data
How do I fix CVE-2026-120328?
Upgrade to a fixed version: 4.2.0, 3.12.5.Source: cve.now feed data