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CVE-2021-36905

WordPress Quiz And Survey Master plugin <= 7.3.4 - Multiple Auth. Stored Cross-Site Scripting (XSS) vulnerabilities

No known exploitation. EPSS puts it in the 39th percentile. Fixed in 7.3.5.

CVSS 3.15.4MediumEPSS percentile39th0.5% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix7.3.5Upgrade to this build

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • ExpressTech Quiz And Survey MasterAffected: ≥ <= 7.3.4, ≤ 7.3.4Upgrade to: after 7.3.4Stated by: CVE record
  • Expresstech Quiz And Survey MasterAffected: < 7.3.5Upgrade to: 7.3.5Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free Nuclei check exists for this CVE. Run it against your hosts.Is your organisation exposed?Discuss checks for your systems with a specialist. Scope is agreed before testing.

What it is

From the CVE record

Multiple Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerabilities in Quiz And Survey Master plugin <= 7.3.4 on WordPress.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS39th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.5% chance of exploitation activity in the next 30 days, which ranks it in the 39th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

6 events over 1205 days, from the signal feeds we watch.

  1. Nuclei check added
  2. Patch availablerecord updated
  3. Publishedweakness classified, att&ck mapped

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Scored 5.4 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction RequiredA user must click a link, open a file, or perform some action

Scope

  • Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)

Impact if exploited

  • Confidentiality LowSome restricted information is disclosed, but limited in scope
  • Integrity LowData modification is possible but limited in scope or consequence
  • Availability NoneNo availability impact

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

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