Claws Mail vCalendar plugin: credentials exposed on interface

published 2019-11-25 6 y ago modified 2026-06-16 4 mo ago also EUVD-2012-5419

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits: 0; none known

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-5527 updated 2025-11-21 cvss 3.6

(vCalendar): User credentials information disclosure via status tray display

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

Claws Mail Claws Mail vCalendar plugin

Classification

Weakness

CWE-522 Insufficiently Protected Credentials

References

security-tracker.debian.org /tracker/CVE-2012-5527
third-party-advisory
bugzilla.redhat.com /show_bug.cgi?id=CVE-2012-5527
issue-tracking, third-party-advisory
openwall.com /lists/oss-security/2012/11/28/10
mailing-list, third-party-advisory
openwall.com /lists/oss-security/2012/11/28/8
mailing-list, third-party-advisory
openwall.com /lists/oss-security/2012/11/28/9
mailing-list, third-party-advisory

Sources

CVE List CVE-2012-5527
NVD CVE-2012-5527

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary