Staging Environment: Content and features may be unstable or change without notice.
Advisory details: vulnrichment / CVE-2026-43882
Advisory ID vulnrichment/CVE-2026-43882
Aliases
Summary WWBN AVideo is an open source video platform. In versions up to and including 29.0, the unauthenticated plugin/Scheduler/downloadICS.php endpoint passes attacker-controlled title, description, and joinURL parameters into Scheduler::downloadICS(), which builds an ICS calendar file via the ICS helper class. ICS::escape_string() (objects/ICS.php:167-169) only escapes , and ; and does NOT neutralize CR/LF, so attacker CRLF bytes inside a property value break out and inject arbitrary ICS lines — including END:VEVENT / BEGIN:VEVENT pairs that add entire attacker-controlled calendar events. Because the malicious .ics file is served from the victim's trusted AVideo origin, this enables high-credibility calendar phishing: forged meetings with attacker-chosen SUMMARY, URL, LOCATION, and DESCRIPTION landing in the victim's calendar after import. Commit 764db592f99e545aa86bb9a4ad664ffd14c38ba5 contains an updated fix.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
System Score Found at
cvssv3.1 4.3
ssvc Track
Reference id Reference type URL
764db592f99e545aa86bb9a4ad664ffd14c38ba5 Other https://github.com/WWBN/AVideo/commit/764db592f99e545aa86bb9a4ad664ffd14c38ba5
GHSA-mwgh-92m2-wvhv Other https://github.com/WWBN/AVideo/security/advisories/GHSA-mwgh-92m2-wvhv
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Found at None
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-13T14:05:03Z/ Found at None

Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-13T14:05:03Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/43xxx/CVE-2026-43882.json

Source Advisory: vulnrichment/CVE-2026-43882

View SSVC decision tree 
[{'Exploitation': 'poc'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]