// For flags

CVE-2020-5283

XSS vulnerability in CVS show_subdir_lastmod support

Severity Score

3.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

ViewVC before versions 1.1.28 and 1.2.1 has a XSS vulnerability in CVS show_subdir_lastmod support. The impact of this vulnerability is mitigated by the need for an attacker to have commit privileges to a CVS repository exposed by an otherwise trusted ViewVC instance that also has the `show_subdir_lastmod` feature enabled. The attack vector involves files with unsafe names (names that, when embedded into an HTML stream, would cause the browser to run unwanted code), which themselves can be challenging to create. This vulnerability is patched in versions 1.2.1 and 1.1.28.

ViewVC versiones anteriores a 1.1.28 y 1.2.1, presenta una vulnerabilidad de tipo XSS en el soporte show_subdir_lastmod de CVS. El impacto de esta vulnerabilidad está mitigado mediante la necesidad de que un atacante tenga privilegios de commit en un repositorio CVS expuesto por una instancia de ViewVC confiable que también tenga la funcionalidad "show_subdir_lastmod" habilitada. El vector de ataque involucra archivos con nombres no seguros (nombres que, cuando se insertan en una secuencia de datos HTML, causarían que el navegador ejecute un código no deseado), que pueden ser en si mismos difíciles de crear. Esta vulnerabilidad está parcheada en las versiones 1.2.1 y 1.1.28.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
High
Authentication
Single
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-01-02 CVE Reserved
  • 2020-04-03 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2024-10-28 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Viewvc
Search vendor "Viewvc"
 Viewvc
Search vendor "Viewvc" for product "Viewvc"
 < 1.1.28
Search vendor "Viewvc" for product "Viewvc" and version " < 1.1.28"
-
Affected
Viewvc
Search vendor "Viewvc"
 Viewvc
Search vendor "Viewvc" for product "Viewvc"
 >= 1.2.0 < 1.2.1
Search vendor "Viewvc" for product "Viewvc" and version " >= 1.2.0 < 1.2.1"
-
Affected