Cross Site Scripting in baserCMS

Description

baserCMS 4.3.6 and earlier is affected by Cross Site Scripting (XSS).

  • Impact: XSS via Arbitrary script execution.
  • Attack vector is: Administrator must be logged in.
  • Components are: content_fields.php, content_info.php, content_options.php, content_related.php, index_list_tree.php, jquery.bcTree.js
  • Tested baserCMS Version : 4.3.6 (Latest)
  • Affected baserCMS Version : 4.0.0 ~ 4.3.6
  • Patches : https://basercms.net/security/20200827

Found by Aquilao Null

Basic information

Type
reviewed
Severity
low
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Not specified
Published (advisory)
2020-08-28 20:48:12 UTC
Updated
2023-01-09 05:03:48 UTC
GitHub reviewed
2020-08-28 20:47:58 UTC

EPSS Score

Score Percentile
0.78% 73.50%

CVSS Scores

Base score Version Severity Vector
7.3 3.1
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

CWEs

CWE id Name
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Credits

  • Aquilao (analyst)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
composer baserproject/basercms >= 4.0.0, <= 4.3.6 4.3.7

References

cvelogic Threat Intelligence