Technology · S9y
S9y Serendipity vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 3 vulnerabilities in S9y Serendipity: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-39971, was published on 15 April 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About S9y Serendipity
Lightweight PHP-based content management and blogging engine.
Latest S9y Serendipity vulnerabilities
- CVE-2026-39971: Serendipity has a Host Header Injection allows SMTP header injection via unvalidated HTTP_HOST in Message-ID email headerhighCVSS 7.2EPSS 0.3%
- CVE-2026-39963: Serendipity Host Header Injection in serendipity_setCookiemediumCVSS 6.9EPSS 0.2%
- CVE-2024-58282: Serendipity 2.5.0 contains a remote code execution vulnerability that allows authenticated administrators to upload…highCVSS 7.2EPSS 1.0%
Most severe S9y Serendipity vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2024-58282: Serendipity 2.5.0 contains a remote code execution vulnerability that allows authenticated administrators to upload…highCVSS 7.2EPSS 1.0%
- CVE-2026-39971: Serendipity has a Host Header Injection allows SMTP header injection via unvalidated HTTP_HOST in Message-ID email headerhighCVSS 7.2EPSS 0.3%
- CVE-2026-39963: Serendipity Host Header Injection in serendipity_setCookiemediumCVSS 6.9EPSS 0.2%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many S9y Serendipity vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/s9y-serendipity-1)<a href="https://junglewise.ai/threats/technologies/s9y-serendipity-1"><img src="https://junglewise.ai/threats/technologies/s9y-serendipity-1/badge.svg" alt="S9y Serendipity vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/s9y-serendipity-1.json, and this page as text at https://junglewise.ai/threats/technologies/s9y-serendipity-1.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "S9y Serendipity vulnerabilities", https://junglewise.ai/threats/technologies/s9y-serendipity-1, 9 November 2026.