CVE-2020-26547

Monal before 4.9 does not implement proper sender verification on MAM and Message Carbon (XEP-0280) results

published February 1, 2021

CVSS
—
EPSS
1%
Percentile
45.1
In the wild
Unconfirmed
What it is

⚠️ A sneaky flaw in Monal before version 4.9 lets attackers play puppet master with messages! 🎭 Think of this vulnerability like a mischievous prankster slipping fake notes into someone's diary, making it look like they were written by someone else. The history appears real, but it’s all fabricated! An attacker could inject arbitrary messages into the victim's local history, manipulating the sender and receiver's identities. This could lead to confusion, misinformation, and even trust issues among users — absolutely devastating in a communication platform!

Put simply

Think of this vulnerability like a mischievous prankster slipping fake notes into someone's diary, making it look like they were written by someone else. The history appears real, but it’s all fabricated! This vulnerability arises from a lack of proper sender verification on Message Archive Management (MAM) and Message Carbon (XEP-0280) results, allowing remote attackers to craft messages that seem legitimate.

What to do

An attacker could inject arbitrary messages into the victim's local history, manipulating the sender and receiver's identities. This could lead to confusion, misinformation, and even trust issues among users — absolutely devastating in a communication platform! Upgrade to Monal version 4.9 or later to close this loophole. Review your messaging protocols for sender verification to prevent similar issues. Don't just patch; enhance your security protocols! You've got this! With the right steps, you can be the hero who secures your messaging environment! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00548 · 45.1th percentile
Published
2021-02-01T01:02Z
EPSS history
Timeline
  • 01 FEB 01:02Z
    Monal before 4.9 does not implement proper sender verification on MAM and Message Carbon (XEP-0280) results
    cvelistv5