CVE-2019-10732: In KDE KMail 5.2.3, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email.
Noroxi assessment
Priority: Monitor (action score 17/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.65% (FIRST EPSS); higher than 51.2% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: kf5-messagelib (Debian:12) 4:19.08.3-1; kdepim (Debian:8) 4:4.14.1-1+deb8u2; messagelib (openSUSE:Leap 15.1) 18.12.3-lp151.2.4.1.
Low priority for now. Upgrade to kf5-messagelib (Debian:12) 4:19.08.3-1; kdepim (Debian:8) 4:4.14.1-1+deb8u2; messagelib (openSUSE:Leap 15.1) 18.12.3-lp151.2.4.1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In KDE KMail 5.2.3, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.
- Published
- Apr 7, 2019
- Updated
- Jun 16, 2026
- EPSS
- 0.6% · 51th percentile
- CWE
- CWE-319
Report tools
Action score
17
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
Check your site's encryption
This vulnerability is about certificate validation or weak cryptography. The free SSL checker tests your certificate, enabled TLS versions and weak ciphers.
Run the SSL checkAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux8.0
- kde kmail5.2.3
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | kf5-messagelib | before 4:19.08.3-1 | 4:19.08.3-1 |
| Debian:8 | kdepim | before 4:4.14.1-1+deb8u2 | 4:4.14.1-1+deb8u2 |
| openSUSE:Leap 15.1 | messagelib | before 18.12.3-lp151.2.4.1 | 18.12.3-lp151.2.4.1 |
| openSUSE:Tumbleweed | messagelib | before 21.08.1-1.2 | 21.08.1-1.2 |
| SUSE:Package Hub 15 SP1 | messagelib | before 18.12.3-bp151.3.3.1 | 18.12.3-bp151.3.3.1 |
Same product
kde: all recordsOther highest-scoring records for the same primary product.
- CVE-2016-7967KMail since version 5.3.0 used a QWebEngine based viewer that had JavaScript enabled.33Monitor
- CVE-2017-9604KDE kmail before 5.5.2 and messagelib before 5.5.2, as distributed in KDE Applications before 17.04.2, do not ensure that a plugin's sign/en30Monitor
- CVE-2016-7966Through a malicious URL that contained a quote character it was possible to inject HTML code in KMail's plaintext viewer.30Monitor
Published before and after this one in the same product
- ← EarlierCVE-2016-7968Dec 23, 2016 · KMail since version 5.3.0 used a QWebEngine based viewer that had JavaScript enabled.26Monitor
- ← EarlierCVE-2014-8878Sep 27, 2017 · KDE KMail does not encrypt attachments in emails when "automatic encryption" is enabled, which allows remote attackers to obtain sensitive i23Monitor
- Later →CVE-2020-11880Apr 17, 2020 · An issue was discovered in KDE KMail before 19.12.3.26Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:kdepim | 4:4.14.1-1+deb8u2 · Debian:8 | Package registry (OSV) |
| debian:kf5-messagelib | 4:19.08.3-1 · Debian:12 | Package registry (OSV) |
| opensuse:messagelib | 18.12.3-lp151.2.4.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| suse:messagelib | 18.12.3-bp151.3.3.1 · SUSE:Package Hub 15 SP1 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- low · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-319 · Cleartext Transmission of Sensitive InformationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.