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CVE-2026-52781

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, the HTML sanitizer grants <macro> elements unrestricted data-* attributes via :data wildcard. An attacker injects data-controller="poll-for-changes" into a work package description, causing Stimulus.js to mount a controller that fetches an attacker-uploaded attachment and passes it to renderStreamMessage(). This executes arbitrary Turbo Stream actions — including redirect_to — in every victim's authent
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:57b5ca02f0971aab12bb9847a184f9686a20abc850b5c44eb9753f39ecd08719
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"openproject","vendor":"opf","versions":[{"status":"affected","version":"< 17.3.3"},{"status":"affected","version":">= 17.4.0, < 17.4.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:204a85940464a1584c6a323e348a9f107e04a5aec930f75e6f3ee0853a9a2051 · sha256:22876e9ba65b1249… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:204a85940464a1584c6a323e348a9f107e04a5aec930f75e6f3ee0853a9a2051 · sha256:22876e9ba65b1249… · /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:v2:204a85940464a1584c6a323e348a9f107e04a5aec930f75e6f3ee0853a9a2051 · sha256:22876e9ba65b1249… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/opf/openproject/security/advisories/GHSA-q33w-f822-hg8x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/opf/openproject/security/advisories/GHSA-q33w-f822-hg8x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:204a85940464a1584c6a323e348a9f107e04a5aec930f75e6f3ee0853a9a2051 · sha256:22876e9ba65b1249… · /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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