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CVE-2026-9838

The ICS Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'htmltagtitle' parameter in all versions up to, and including, 12.0.9 due to insufficient input sanitization and output escaping. 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 link. The vulnerability is reachable via the unauthenticated wp_ajax_nopriv_r34ics_
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3c2b6158649ad74902098343e7b8c6f26c82bd0d801a905af6929a88d4deb590
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"ICS Calendar","vendor":"room34","versions":[{"lessThanOrEqual":"12.0.9","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":6.1,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/problemTypes/0/descriptions/0

Source references

10 source assertions
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.5.2/r34ics-ajax.php#L33"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/6
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.5.2/r34ics-ajax.php#L53"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/7
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.5.2/r34ics-ajax.php#L72"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/8
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.5.2/templates/calendar-month.php#L40"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/5
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.8.4/r34ics-ajax.php#L33"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/2
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.8.4/r34ics-ajax.php#L53"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/3
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.8.4/r34ics-ajax.php#L72"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/4
{"url":"https://plugins.trac.wordpress.org/browser/ics-calendar/tags/12.0.8.4/templates/calendar-month.php#L40"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/1
{"url":"https://plugins.trac.wordpress.org/changeset?reponame=&old=3563728%40ics-calendar&new=3563728%40ics-calendar"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/9
{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/a4d91b01-5034-42b5-857f-c66c875dd562?source=cve"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8a171937c377af615aedbe1994d5f5bb0c72b2885834950561031e3a5465fd6f · sha256:96c84d25119b8d75… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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