CVE-2026-17532 json
Seraphinite Accelerator <= 2.29.18 - Reflected Cross-Site Scripting
published 2026-08-05 3 mo ago modified 2026-08-12 2 mo ago also EUVD-2026-53175
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
The Seraphinite Accelerator plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'seraph_accel_prep' parameter in versions up to, and including, 2.29.15. This is due to the CacheExtractPreparePageParams() function using PHP's loose inequality operator (!=) to compare the expected HMAC string against the JSON-decoded 'nonce' value — supplying the JSON boolean true causes any non-empty HMAC string to compare as loosely equal, bypassing the signature check — combined with insufficient output escaping in the _CbContentFinishSkip() function, which concatenates the attacker-controlled 'selfTest' field directly into the HTML response body. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Seraphinite Accelerator <= 2.29.18 - Cross-Site Scripting nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected products
- seraphinitesoft Seraphinite Accelerator
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/5aeea62b-bd6c-4fe2-8c0f-8c9919688e87?source=cve
- plugins.trac.wordpress.org /browser/seraphinite-accelerator/tags/2.29.18/cache_ex.php#L838
- plugins.trac.wordpress.org /browser/seraphinite-accelerator/tags/2.29.18/common.php#L6036
- plugins.trac.wordpress.org /browser/seraphinite-accelerator/tags/2.29.18/cache.php#L76
- plugins.trac.wordpress.org /browser/seraphinite-accelerator/tags/2.29.15/cache_ex.php#L838
- plugins.trac.wordpress.org /browser/seraphinite-accelerator/tags/2.29.15/common.php#L6036
- plugins.trac.wordpress.org /browser/seraphinite-accelerator/tags/2.29.15/cache.php#L76
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&new=3624461%40seraphinite-accelerator%2Ftrunk%2Fcommon.php&old=3619
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&new=3624461%40seraphinite-accelerator%2Ftrunk%2Fcache_ex.php&old=36
Sources
- CVE List CVE-2026-17532
- NVD CVE-2026-17532
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.