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CVE-2025-59161VulnerabilityPublished

CVE-2025-59161: element-web · Improper Input Validation

Affects element-webSource CVE Database V5

0

Not known to be exploited · CVSS 2.7 Low : upgrade to 1.11.112 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score
2.7Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.11.112
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Upgrade element-web to 1.11.112.

Affected software

ProductAffectedFixed in
element-hq element-webAffected
  • <1.11.112
Fixed in
  • 1.11.112

AI-suggested

1. Immediate upgrade of all Element Web and Desktop clients to version 1.11.112 or later to ensure the patch is applied. 2. Implement user awareness training to recognize potential anomalies in room listings and encourage verification before acting on unexpected room entries. 3. Monitor Matrix client logs and network traffic for unusual room predecessor link activity or unexpected room list changes that could indicate exploitation attempts. 4. Deploy endpoint security solutions capable of detecting anomalous client behavior or unauthorized modifications to client state. 5. Encourage users to perform a manual refresh or reload of the client if suspicious room list behavior is observed, as this action restores the correct state. 6. For organizations with custom Matrix integrations, review and harden input validation logic related to room metadata to prevent similar issues. 7. Maintain an up-to-date inventory of Matrix clients in use across the organization to ensure timely patch management.

Description

Element Web is a Matrix web client built using the Matrix React SDK. Element Web and Element Desktop before version 1.11.112 have insufficient validation of room predecessor links, allowing a remote attacker to attempt to impermanently replace a room's entry in the room list with an unrelated attacker-supplied room. While the effect of this is temporary, it may still confuse users into acting on incorrect assumptions. The issue has been patched and users should upgrade to 1.11.112. A reload/refresh will fix the incorrect room list state, removing the attacker's room and restoring the original room.

References

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