CVE-2026-13253

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreHIGH confidence

Score 6.4 from GitHub Security Advisory published 2026-07-09. a secondary CVSS source baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.4Exploit: NoneExposed: 0

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

The Ultimate Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'moreResultsText' block attribute of the ultimate-post/advanced-search block in versions up to and including 5.0.31. This is due to insufficient input sanitization and output escaping in the Advanced_Search::content() render callback: the attribute value is filtered with wp_kses(), which strips disallowed HTML tags but does NOT escape HTML special characters such as double quotes in plain text, and the result is then concatenated directly into the data-viewmoretext HTML attribute without esc_attr(). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS v3
6.4
EG Score
6.4(high)
EPSS
10.7%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 2026

References (8)

Vendor Advisories for CVE-2026-13253(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 21× in last 7d / 21× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 12:46 UTCEG score recompute
  3. 2026-07-15 12:45 UTCGHSA enrichment
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-14 11:56 UTCEG score recompute
  6. 2026-07-14 11:56 UTCGHSA enrichment
  7. 2026-07-13 22:30 UTCEPSS rescore
  8. 2026-07-13 11:11 UTCEG score recompute
  9. 2026-07-13 11:10 UTCGHSA enrichment
  10. 2026-07-13 06:12 UTCEPSS rescore
  11. 2026-07-12 10:24 UTCEG score recompute
  12. 2026-07-12 10:24 UTCGHSA enrichment
  13. 2026-07-12 05:46 UTCEPSS rescore
  14. 2026-07-11 09:36 UTCEG score recompute
  15. 2026-07-11 09:36 UTCGHSA enrichment
  16. 2026-07-11 08:27 UTCEPSS rescore
  17. 2026-07-10 08:49 UTCEG score recompute
  18. 2026-07-10 08:49 UTCGHSA enrichment
  19. 2026-07-09 19:10 UTCEPSS rescore
  20. 2026-07-09 08:03 UTCEG score recompute
  21. 2026-07-09 08:01 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13253?
CVE-2026-13253 is a medium vulnerability published on July 9, 2026. The Ultimate Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'moreResultsText' block attribute of the ultimate-post/advanced-search block in versions up to and including 5.0.31. This is due to insufficient input sanitization and output escaping in the…
When was CVE-2026-13253 disclosed?
CVE-2026-13253 was first published in the National Vulnerability Database on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13253 actively exploited?
CVE-2026-13253 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-13253?
CVE-2026-13253 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2026-13253?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13253, 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

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