6.5

CVE-2021-31855: kde messagelib

CVSS: 6.5v3.1MediumModified
AliasesMGASA-2021-0208UBUNTU-CVE-2021-31855DEBIAN-CVE-2021-31855
Published 02-06-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-31855 is a medium (CVSS 6.5) vulnerability in kde messagelib. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.61%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2024:11046-1

Timeline

  1. 02-06-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

KDE Messagelib through 5.17.0 reveals cleartext of encrypted messages in some situations. Deleting an attachment of a decrypted encrypted message stored on a remote server (e.g., an IMAP server) causes KMail to upload the decrypted content of the message to the remote server. With a crafted message, a user could be tricked into decrypting an encrypted message and then deleting an attachment attached to this message. If the attacker has access to the messages stored on the email server, then the attacker could read the decrypted content of the encrypted message. This occurs in ViewerPrivate::deleteAttachment in messageviewer/src/viewer/viewer_p.cpp.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.61%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

0.00 pp

From 0.61% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.61%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mageia2 products
  • messagelib< 19.04.0-1.2.mga7
  • messagelib< 20.12.0-1.1.mga8
Ubuntu2 products
  • kdepim4All versions (No fix recorded)
  • kf5-messagelibAll versions (No fix recorded)
Debian1 product
  • kf5-messagelib< 4:20.08.3-5
Kde1 product

4 vendors · 6 products

References

8 links