CVE-2026-18322: Smart Popup by Supsystic (WordPress plugin) · Improper Privilege Management
Affects Smart Popup by Supsystic (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 3 Nov 2026, 22:58 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 5 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| supsysticcomSmart Popup by Supsystic | Affected
| Fixed in– |
AI-suggested
Until an official fix is available, restrict access to admin-ajax.php where possible and monitor for suspicious POST requests targeting the save action. Avoid using affected versions of the plugin and consider disabling it if immediate patching is not possible.
Description
Smart Popup by Supsystic WordPress plugin versions up to 1.12.0 contain a privilege escalation vulnerability. This arises from improper permission management in the havePermissions() function, allowing unauthenticated attackers to create persistent administrator accounts by exploiting a nonce reuse and lack of server-side role restrictions. The vulnerability enables attackers to submit crafted POST requests to admin-ajax.php and escalate privileges to administrator.
References
- wordfence.com/threat-intel/vulnerabilities/id/835579b0-8a96-40fa-a6a3-30571a0a1d0a?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/browser/popup-by-supsystic/tags/1.11.2/classes/frame.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/popup-by-supsystic/tags/1.11.2/modules/subscribe/models/subscribe.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/popup-by-supsystic/tags/1.11.2/modules/subscribe/models/subscribe.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/popup-by-supsystic/tags/1.11.2/modules/popup/models/popup.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/popup-by-supsystic/tags/1.11.2/modules/subscribe/models/subscribe.php (opens in a new tab)
- plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3629986%40popup-by-supsystic%2Ftrunk%2Fmodules%2Fsubscribe%2Fmodels%2Fsubscribe.php&old=3628131%40popup-by-supsystic%2Ftrunk%2Fmodules%2Fsubscribe%2Fmodels%2Fsubscribe.php&sfp_email=&sfph_mail= (opens in a new tab)