CVE-2024-6879 | Quiz and Survey Master (QSM) < 9.1.1 - Contributor+ Stored XSS

Exp

The Quiz and Survey Master (QSM) WordPress plugin before 9.1.1 fails to validate and escape certain Quiz fields before displaying them on a page or post where the Quiz is embedded, which could allows contributor and above roles to perform Stored Cross-Site Scripting (XSS) attacks.

Published: 2024-08-26 Last update: 2025-05-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-6879 is rated Exploit Available (52.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.31%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-6879

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-6879

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-01 0.23% 0.31% +0.08%
2 2025-11-06 0.30% 0.23% -0.07%
3 2025-10-13 — 0.30% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-6879

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.7 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-6879

Affected software / configurations for CVE-2024-6879

Vendor Product Version Raw CPE
expresstech quiz_and_survey_master < 9.1.1 cpe:2.3:a:expresstech:quiz_and_survey_master:*:*:*:*:*:wordpress:*:*

References for CVE-2024-6879

cvelogic Threat Intelligence