CVE-2012-5527: Claws Mail vCalendar plugin: credentials exposed on interface

Routine

MEDIUM 5.5WATCHLISTMITIGATE

CVE-2012-5527 is a medium-severity flaw (CVSS 5.5) affecting vcalendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Claws Mail vCalendar plugin: credentials exposed on interface

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-522
Published	2019-11-25
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: claws-mail

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-11-25 14:15 UTCPublished CVE record published
2026-06-16 23:46 UTCUpdated Record last modified

claws-mail vcalendar MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vcalendar || rpm -q vcalendar || vcalendar --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-5527?

vcalendar: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-5527 being exploited?

CVE-2012-5527 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-5527 affect?

CVE-2012-5527 affects vcalendar. Severity is medium (CVSS 5.5). Claws Mail vCalendar plugin: credentials exposed on interface

How urgent is CVE-2012-5527?

Priority 35/100. On your watchlist

References

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