CVE-2025-2817
Privilege escalation in Thunderbird Updater
02 Description
Privilege escalation in Thunderbird Updater
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.65% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 51.1% of scored records. A rank, not a probability.
- NVD base score
- 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-05.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-04-29 13:13Z1 YR AGO
- Last updated
- 2026-04-13 14:27Z6 MO AGO
- Reserved
- 2025-03-26
- Assigning CNA
- mozilla
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- 595d83d2cfbf8e393a11d7a7a384591c072ba59e20143c4523312aaa1f7f7ca3
05 Affected products
06 References
- bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1917536
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-28/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-29/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-30/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-31/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-32/
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00022.html
07 Fixed in
AlmaLinux 8
- firefox Fixed in 128.10.0-1.el8_10.alma.1
- thunderbird Fixed in 128.10.0-1.el8_10.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- firefox Fixed
A version is affected if any line below covers it.
- Affected before 128.10.0-1.el9_5.alma.1
- Affected before 128.10.0-1.el9_6.alma.1
- firefox-x11 Fixed
A version is affected if any line below covers it.
- Affected before 128.10.0-1.el9_5.alma.1
- Affected before 128.10.0-1.el9_6.alma.1
- thunderbird Fixed in 128.10.0-1.el9_5.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- firefox Fixed in 128.10.0-1.el10_0
- thunderbird Fixed in 128.10.0-1.el10_0.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- firefox Fixed in 128.10.0-1.el8_10.alma.1
- thunderbird Fixed in 128.10.0-1.el8_10.alma.1
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- firefox Fixed
A version is affected if any line below covers it.
- Affected before 128.10.0-1.el9_5.alma.1
- Affected before 128.10.0-1.el9_6.alma.1
- firefox-x11 Fixed
A version is affected if any line below covers it.
- Affected before 128.10.0-1.el9_5.alma.1
- Affected before 128.10.0-1.el9_6.alma.1
- thunderbird Fixed in 128.10.0-1.el9_5.alma.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- firefox Fixed in 128.10.0-1.el10_0
- thunderbird Fixed in 128.10.0-1.el10_0.alma.1
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.