// For flags

CVE-2025-1795

Mishandling of comma during folding and unicode-encoding of email headers

Severity Score

2.3
*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

During an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.

It was discovered that Python incorrectly handled certain unicode characters during decoding. An attacker could possibly use this issue to cause a denial of service. It was discovered that Python incorrectly handled unicode encoding of email headers with list separators in folded lines. An attacker could possibly use this issue to expose sensitive information.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
System
Vulnerable | Subsequent
Confidentiality
Low
None
Integrity
None
None
Availability
None
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-02-28 CVE Reserved
  • 2025-02-28 CVE Published
  • 2025-02-28 CVE Updated
  • 2025-06-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-116: Improper Encoding or Escaping of Output
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Python Software Foundation
Search vendor "Python Software Foundation"
 CPython
Search vendor "Python Software Foundation" for product "CPython"
 < 3.11.9
Search vendor "Python Software Foundation" for product "CPython" and version " < 3.11.9"
en
Affected
Python Software Foundation
Search vendor "Python Software Foundation"
 CPython
Search vendor "Python Software Foundation" for product "CPython"
 >= 3.12.0 < 3.12.3
Search vendor "Python Software Foundation" for product "CPython" and version " >= 3.12.0 < 3.12.3"
en
Affected