Quiz and Survey Master (QSM) <= 11.2.7 - Unauthenticated Arbitrary Shortcode Execution via 'qsm_unique_key' Parameter
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- Last modified
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.28% · 20th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 29/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The Quiz and Survey Master (QSM) plugin for WordPress is affected by a flaw that lets attackers execute arbitrary shortcodes. Attackers can reach it remotely, without logging in or any user action, and can gain limited ability to read and change data.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
The The Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 11.2.7. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. The submission nonce is dispensed to any unauthenticated caller by the public wp_ajax_nopriv_qsm_create_quiz_nonce endpoint, meaning it functions as a CSRF token rather than an authorization barrier and imposes no meaningful obstacle to exploitation.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed per the CVSS vector, reachable over the network without a login · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity6.5/10CVSS 6.5
- No patch5/5No patch listed yet
What would change the score
- Would score about 74 if added to CISA KEV
- Would score about 69 if CISA's SSVC rates exploitation active
- Would score about 34 if advisories confirm default setups are exposed
Timeline
- CVE published
- First seen by cve.now
Affected versions
- expresstech Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
through 11.2.7
Evidence 6
- Link
- Link
- Link
- Link
- Link
- Link
Corrections
None so far.
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Questions about CVE-2026-103917
Is CVE-2026-103917 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-103917?
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker: through 11.2.7.Source: cve.now feed data