CVE-2012-5851

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 2%CVSS: —Exploit: NoneExposed: 0

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

html/parser/XSSAuditor.cpp in WebCore in WebKit, as used in Google Chrome through 22 and Safari 5.1.7, does not consider all possible output contexts of reflected data, which makes it easier for remote attackers to bypass a cross-site scripting (XSS) protection mechanism via a crafted string, aka rdar problem 12019108.

CVSS v3
—
EG Score
0.0(none)
EPSS
81.5%
KEV
Not listed

Published

November 15, 2012

Last Modified

April 29, 2026

References (6)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 34× 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. 2026-07-06 02:19 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
  3. 2026-07-05 02:26 UTCEPSS rescore
  4. 2026-07-04 06:27 UTCEPSS rescore
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  6. 2026-06-30 23:19 UTCEPSS rescore
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  10. 2026-06-28 04:53 UTCEPSS rescore
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  12. 2026-06-27 03:05 UTCEPSS rescore
  13. 2026-06-25 13:46 UTCEPSS rescore
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  16. 2026-06-23 21:30 UTCEPSS rescore
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  19. 2026-06-21 14:53 UTCEPSS rescore
  20. 2026-06-19 19:23 UTCEPSS rescore
  21. 2026-06-19 19:22 UTCEPSS rescore
  22. 2026-06-18 17:49 UTCEPSS rescore
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  1. 2026-06-16 17:49 UTCEPSS rescore
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  3. 2026-06-15 17:44 UTCEPSS rescore
  4. 2026-06-14 23:14 UTCEPSS rescore
  5. 2026-06-13 22:57 UTCEPSS rescore
  6. 2026-06-12 23:08 UTCEPSS rescore
  7. 2026-06-11 13:56 UTCEPSS rescore
  8. 2026-06-10 13:18 UTCEPSS rescore
  9. 2026-06-08 14:14 UTCEPSS rescore
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  11. 2026-06-06 13:45 UTCEPSS rescore
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  17. 2026-06-02 20:10 UTCEPSS rescore
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  19. 2026-06-01 13:49 UTCEPSS rescore
  20. 2026-06-01 13:49 UTCEPSS rescore
  21. 2026-05-31 22:28 UTCEPSS rescore
  22. 2026-05-31 22:28 UTCEPSS rescore
  23. 2026-05-31 00:14 UTCEPSS rescore
  24. 2026-05-31 00:14 UTCEPSS rescore
  25. 2026-05-29 13:41 UTCEPSS rescore
  26. 2026-05-29 13:41 UTCEPSS rescore
  27. 2026-05-29 01:54 UTCEG score recompute
  28. 2026-05-29 01:54 UTCGHSA enrichment
  29. 2026-05-28 13:42 UTCEPSS rescore
  30. 2026-05-28 13:42 UTCEPSS rescore
  31. 2026-05-28 13:42 UTCEPSS rescore
  32. 2026-05-27 13:38 UTCEPSS rescore
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  34. 2026-05-26 13:41 UTCEPSS rescore
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  36. 2026-05-26 07:16 UTCEPSS rescore
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  38. 2026-05-24 16:43 UTCEPSS rescore
  39. 2026-05-22 21:15 UTCEPSS rescore
  40. 2026-05-22 21:15 UTCEPSS rescore
  41. 2026-05-22 21:15 UTCEPSS rescore
  42. 2026-05-21 22:39 UTCEPSS rescore
  43. 2026-05-20 22:37 UTCEPSS rescore
  44. 2026-05-20 22:37 UTCEPSS rescore
  45. 2026-05-20 11:21 UTCEPSS rescore
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  47. 2026-05-20 11:21 UTCEPSS rescore
  48. 2026-05-18 21:29 UTCEPSS rescore
  49. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • Exploit-DBEDB-38024✓ verified
    First seen Jul 19, 2012

    WebKit Cross-Site Scripting Filter - 'Cross-Site ScriptingAuditor.cpp' Security Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2012-5851?
CVE-2012-5851 is a none vulnerability published on November 15, 2012. html/parser/XSSAuditor.cpp in WebCore in WebKit, as used in Google Chrome through 22 and Safari 5.1.7, does not consider all possible output contexts of reflected data, which makes it easier for remote attackers to bypass a cross-site scripting (XSS) protection mechanism via a crafted string, aka…
When was CVE-2012-5851 disclosed?
CVE-2012-5851 was first published in the National Vulnerability Database on November 15, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-5851 actively exploited?
CVE-2012-5851 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 81.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2012-5851?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-5851, 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.

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