CVE-2026-17532

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-08-05. a secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.1
EG Score
6.1(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity61% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 12, 2026

References (9)

Vendor Advisories for CVE-2026-17532(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 51× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 14:20 UTCEG score recompute
  3. 2026-08-20 14:20 UTCGHSA enrichment
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-19 14:56 UTCGHSA enrichment
  6. 2026-08-18 15:50 UTCEG score recompute
  7. 2026-08-18 15:50 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 16:45 UTCEG score recompute
  10. 2026-08-17 16:45 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-16 17:40 UTCEG score recompute
  13. 2026-08-16 17:40 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 18:26 UTCEG score recompute
  17. 2026-08-15 18:26 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 19:20 UTCEG score recompute
  20. 2026-08-14 19:20 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 20:13 UTCGHSA enrichment
  23. 2026-08-12 21:07 UTCEG score recompute
  24. 2026-08-12 21:07 UTCGHSA enrichment
  25. 2026-08-12 13:50 UTCEPSS rescore
Show 26 more
  1. 2026-08-12 09:09 UTCEG score recompute
  2. 2026-08-12 09:09 UTCGHSA enrichment
  3. 2026-08-11 13:42 UTCEPSS rescore
  4. 2026-08-11 10:04 UTCEG score recompute
  5. 2026-08-11 10:03 UTCGHSA enrichment
  6. 2026-08-11 00:00 UTCEPSS rescore
  7. 2026-08-10 10:58 UTCEG score recompute
  8. 2026-08-10 10:58 UTCGHSA enrichment
  9. 2026-08-09 13:46 UTCEPSS rescore
  10. 2026-08-09 11:51 UTCEG score recompute
  11. 2026-08-09 11:51 UTCGHSA enrichment
  12. 2026-08-08 16:37 UTCEPSS rescore
  13. 2026-08-08 12:45 UTCEG score recompute
  14. 2026-08-08 12:45 UTCGHSA enrichment
  15. 2026-08-07 13:39 UTCGHSA enrichment
  16. 2026-08-06 14:33 UTCEG score recompute
  17. 2026-08-06 14:33 UTCGHSA enrichment
  18. 2026-08-06 13:46 UTCEPSS rescore
  19. 2026-08-05 19:17 UTCEPSS rescore
  20. 2026-08-05 15:27 UTCEG score recompute
  21. 2026-08-05 15:27 UTCGHSA enrichment
  22. 2026-08-05 14:37 UTCEG score recompute
  23. 2026-08-05 14:37 UTCGHSA enrichment
  24. 2026-08-05 08:23 UTCEG score recompute
  25. 2026-08-05 07:24 UTCEG score recompute
  26. 2026-08-05 07:20 UTCMITRE cvelistV5first tracked

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCkalhoralireza/CVE-2026-17532
    First seen Aug 5, 2026

    Seraphinite Accelerator <= 2.29.18 - Reflected Cross-Site Scripting PoC

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-17532.yaml
    First seen Jan 1, 2026

    Seraphinite Accelerator <= 2.29.18 - Cross-Site Scripting

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-17532?
CVE-2026-17532 is a medium vulnerability published on August 5, 2026. The Seraphinite Accelerator plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'seraphaccelprep' 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…
When was CVE-2026-17532 disclosed?
CVE-2026-17532 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17532 actively exploited?
CVE-2026-17532 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.7% of all scored CVEs.
What is the CVSS score of CVE-2026-17532?
CVE-2026-17532 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-17532?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17532, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-17532

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