CVE-2026-100175Postie <= 1.9.87 - Unauthenticated Stored Cross-Site Scripting via Email Body URL Autolink
- 5.4MediumCVSS base score
- 0.33%Exploitation in 30 daysEPSS · top 73% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The Postie plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Email Body URL Autolink in all versions up to, and including, 1.9.87 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is possible because the ?postie=get-mail endpoint is reachable by unauthenticated users with no capability check, and the email processing path removes WordPress's kses output filters before saving raw markup, allowing the unescaped href attribute value to be stored as post content.
Timeline
ID reserved
By Wordfence
- 33 days later
· 33 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.33% · top 73% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Affected products
- affected ≤ 1.9.87
References
References9
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5b7d5d53-51a0-4d45-a180-0bde9edd8f4c?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/postie/tags/1.9.87/lib/autolink.php#L220 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/postie/tags/1.9.87/lib/autolink.php#L136 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/postie/tags/1.9.87/lib/autolink.php#L129 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/postie/tags/1.9.87/postie-filters.php#L475 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/postie/tags/1.9.87/postie-message.php#L607 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/postie/tags/1.9.87/postie-message.php#L1311 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/postie/tags/1.9.87/postie.php#L241 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3751269 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-111751 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-100175)Record last updated .